diff --git a/debug/fgets_chk.c b/debug/fgets_chk.c
index f2236533700..d86454f3e81 100644
--- a/debug/fgets_chk.c
+++ b/debug/fgets_chk.c
@@ -40,12 +40,12 @@ __fgets_chk (char *buf, size_t size, int n, FILE *fp)
   /* This is very tricky since a file descriptor may be in the
      non-blocking mode. The error flag doesn't mean much in this
      case. We return an error only when there is a new error. */
-  int old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
-  fp->_IO_file_flags &= ~_IO_ERR_SEEN;
+  int old_error = fp->_flags & _IO_ERR_SEEN;
+  fp->_flags &= ~_IO_ERR_SEEN;
   count = _IO_getline (fp, buf, MIN ((size_t) n - 1, size), '\n', 1);
   /* If we read in some bytes and errno is EAGAIN, that error will
      be reported for next read. */
-  if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN)
+  if (count == 0 || ((fp->_flags & _IO_ERR_SEEN)
 		     && errno != EAGAIN))
     result = NULL;
   else if (count >= size)
@@ -55,7 +55,7 @@ __fgets_chk (char *buf, size_t size, int n, FILE *fp)
       buf[count] = '\0';
       result = buf;
     }
-  fp->_IO_file_flags |= old_error;
+  fp->_flags |= old_error;
   _IO_release_lock (fp);
   return result;
 }
diff --git a/debug/fgets_u_chk.c b/debug/fgets_u_chk.c
index 317ae5649df..924634c17bc 100644
--- a/debug/fgets_u_chk.c
+++ b/debug/fgets_u_chk.c
@@ -39,13 +39,12 @@ __fgets_unlocked_chk (char *buf, size_t size, int n, FILE *fp)
   /* This is very tricky since a file descriptor may be in the
      non-blocking mode. The error flag doesn't mean much in this
      case. We return an error only when there is a new error. */
-  int old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
-  fp->_IO_file_flags &= ~_IO_ERR_SEEN;
+  int old_error = fp->_flags & _IO_ERR_SEEN;
+  fp->_flags &= ~_IO_ERR_SEEN;
   count = _IO_getline (fp, buf, MIN ((size_t) n - 1, size), '\n', 1);
   /* If we read in some bytes and errno is EAGAIN, that error will
      be reported for next read. */
-  if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN)
-		     && errno != EAGAIN))
+  if (count == 0 || ((fp->_flags & _IO_ERR_SEEN) && errno != EAGAIN))
     result = NULL;
   else if (count >= size)
     __chk_fail ();
@@ -54,6 +53,6 @@ __fgets_unlocked_chk (char *buf, size_t size, int n, FILE *fp)
       buf[count] = '\0';
       result = buf;
     }
-  fp->_IO_file_flags |= old_error;
+  fp->_flags |= old_error;
   return result;
 }
diff --git a/debug/fgetws_chk.c b/debug/fgetws_chk.c
index 8ea6635b30e..2380059f0f1 100644
--- a/debug/fgetws_chk.c
+++ b/debug/fgetws_chk.c
@@ -32,8 +32,8 @@ __fgetws_chk (wchar_t *buf, size_t size, int n, FILE *fp)
   /* This is very tricky since a file descriptor may be in the
      non-blocking mode. The error flag doesn't mean much in this
      case. We return an error only when there is a new error. */
-  old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
-  fp->_IO_file_flags &= ~_IO_ERR_SEEN;
+  old_error = fp->_flags & _IO_ERR_SEEN;
+  fp->_flags &= ~_IO_ERR_SEEN;
   count = _IO_getwline (fp, buf, MIN ((size_t) n - 1, size), L'\n', 1);
   /* If we read in some bytes and errno is EAGAIN, that error will
      be reported for next read. */
@@ -46,7 +46,7 @@ __fgetws_chk (wchar_t *buf, size_t size, int n, FILE *fp)
       buf[count] = '\0';
       result = buf;
     }
-  fp->_IO_file_flags |= old_error;
+  fp->_flags |= old_error;
   _IO_release_lock (fp);
   return result;
 }
diff --git a/debug/fgetws_u_chk.c b/debug/fgetws_u_chk.c
index 42dad6bc8b5..8147eb1e36c 100644
--- a/debug/fgetws_u_chk.c
+++ b/debug/fgetws_u_chk.c
@@ -40,13 +40,12 @@ __fgetws_unlocked_chk (wchar_t *buf, size_t size, int n, FILE *fp)
   /* This is very tricky since a file descriptor may be in the
      non-blocking mode. The error flag doesn't mean much in this
      case. We return an error only when there is a new error. */
-  old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
-  fp->_IO_file_flags &= ~_IO_ERR_SEEN;
+  old_error = fp->_flags & _IO_ERR_SEEN;
+  fp->_flags &= ~_IO_ERR_SEEN;
   count = _IO_getwline (fp, buf, MIN ((size_t) n - 1, size), L'\n', 1);
   /* If we read in some bytes and errno is EAGAIN, that error will
      be reported for next read. */
-  if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN)
-		     && errno != EAGAIN))
+  if (count == 0 || ((fp->_flags & _IO_ERR_SEEN) && errno != EAGAIN))
     result = NULL;
   else if (count >= size)
     __chk_fail ();
@@ -55,6 +54,6 @@ __fgetws_unlocked_chk (wchar_t *buf, size_t size, int n, FILE *fp)
       buf[count] = '\0';
       result = buf;
     }
-  fp->_IO_file_flags |= old_error;
+  fp->_flags |= old_error;
   return result;
 }
diff --git a/debug/gets_chk.c b/debug/gets_chk.c
index df3f947e705..2b1416b295e 100644
--- a/debug/gets_chk.c
+++ b/debug/gets_chk.c
@@ -51,17 +51,17 @@ __gets_chk (char *buf, size_t size)
       /* This is very tricky since a file descriptor may be in the
 	 non-blocking mode. The error flag doesn't mean much in this
 	 case. We return an error only when there is a new error. */
-      int old_error = _IO_stdin->_IO_file_flags & _IO_ERR_SEEN;
-      _IO_stdin->_IO_file_flags &= ~_IO_ERR_SEEN;
+      int old_error = _IO_stdin->_flags & _IO_ERR_SEEN;
+      _IO_stdin->_flags &= ~_IO_ERR_SEEN;
       buf[0] = (char) ch;
       count = _IO_getline (_IO_stdin, buf + 1, size - 1, '\n', 0) + 1;
-      if (_IO_stdin->_IO_file_flags & _IO_ERR_SEEN)
+      if (_IO_stdin->_flags & _IO_ERR_SEEN)
 	{
 	  retval = NULL;
 	  goto unlock_return;
 	}
       else
-	_IO_stdin->_IO_file_flags |= old_error;
+	_IO_stdin->_flags |= old_error;
     }
   if (count >= size)
     __chk_fail ();
diff --git a/libio/fileops.c b/libio/fileops.c
index 1162b1b1442..fb39bec63cd 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -109,7 +109,7 @@ _IO_new_file_init_internal (struct _IO_FILE_plus *fp)
      of our file descriptor.  Hence we actually don't know the actual
      position before we do the first fseek (and until a following fflush). */
   fp->file._offset = _IO_pos_BAD;
-  fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS;
+  fp->file._flags |= CLOSED_FILEBUF_FLAGS;
 
   _IO_link_in (fp);
   fp->file._fileno = -1;
diff --git a/libio/iofclose.c b/libio/iofclose.c
index c7c44ed9b47..7a8b89f9f54 100644
--- a/libio/iofclose.c
+++ b/libio/iofclose.c
@@ -45,11 +45,11 @@ _IO_new_fclose (FILE *fp)
 #endif
 
   /* First unlink the stream.  */
-  if (fp->_IO_file_flags & _IO_IS_FILEBUF)
+  if (fp->_flags & _IO_IS_FILEBUF)
     _IO_un_link ((struct _IO_FILE_plus *) fp);
 
   _IO_acquire_lock (fp);
-  if (fp->_IO_file_flags & _IO_IS_FILEBUF)
+  if (fp->_flags & _IO_IS_FILEBUF)
     status = _IO_file_close_it (fp);
   else
     status = fp->_flags & _IO_ERR_SEEN ? -1 : 0;
@@ -73,7 +73,7 @@ _IO_new_fclose (FILE *fp)
     }
   if (fp != _IO_stdin && fp != _IO_stdout && fp != _IO_stderr)
     {
-      fp->_IO_file_flags = 0;
+      fp->_flags = 0;
       free(fp);
     }
 
diff --git a/libio/iofgets.c b/libio/iofgets.c
index b15b59d3bf6..68177dbe22d 100644
--- a/libio/iofgets.c
+++ b/libio/iofgets.c
@@ -48,20 +48,19 @@ _IO_fgets (char *buf, int n, FILE *fp)
   /* This is very tricky since a file descriptor may be in the
      non-blocking mode. The error flag doesn't mean much in this
      case. We return an error only when there is a new error. */
-  old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
-  fp->_IO_file_flags &= ~_IO_ERR_SEEN;
+  old_error = fp->_flags & _IO_ERR_SEEN;
+  fp->_flags &= ~_IO_ERR_SEEN;
   count = _IO_getline (fp, buf, n - 1, '\n', 1);
   /* If we read in some bytes and errno is EAGAIN, that error will
      be reported for next read. */
-  if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN)
-		     && errno != EAGAIN))
+  if (count == 0 || ((fp->_flags & _IO_ERR_SEEN) && errno != EAGAIN))
     result = NULL;
   else
     {
       buf[count] = '\0';
       result = buf;
     }
-  fp->_IO_file_flags |= old_error;
+  fp->_flags |= old_error;
   _IO_release_lock (fp);
   return result;
 }
diff --git a/libio/iofgets_u.c b/libio/iofgets_u.c
index 90916446857..9d33a376219 100644
--- a/libio/iofgets_u.c
+++ b/libio/iofgets_u.c
@@ -47,20 +47,19 @@ __fgets_unlocked (char *buf, int n, FILE *fp)
   /* This is very tricky since a file descriptor may be in the
      non-blocking mode. The error flag doesn't mean much in this
      case. We return an error only when there is a new error. */
-  old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
-  fp->_IO_file_flags &= ~_IO_ERR_SEEN;
+  old_error = fp->_flags & _IO_ERR_SEEN;
+  fp->_flags &= ~_IO_ERR_SEEN;
   count = _IO_getline (fp, buf, n - 1, '\n', 1);
   /* If we read in some bytes and errno is EAGAIN, that error will
      be reported for next read. */
-  if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN)
-		     && errno != EAGAIN))
+  if (count == 0 || ((fp->_flags & _IO_ERR_SEEN) && errno != EAGAIN))
     result = NULL;
   else
     {
       buf[count] = '\0';
       result = buf;
     }
-  fp->_IO_file_flags |= old_error;
+  fp->_flags |= old_error;
   return result;
 }
 libc_hidden_def (__fgets_unlocked)
diff --git a/libio/iofgetws.c b/libio/iofgetws.c
index 0e2d515df5e..292a161757d 100644
--- a/libio/iofgetws.c
+++ b/libio/iofgetws.c
@@ -48,8 +48,8 @@ fgetws (wchar_t *buf, int n, FILE *fp)
   /* This is very tricky since a file descriptor may be in the
      non-blocking mode. The error flag doesn't mean much in this
      case. We return an error only when there is a new error. */
-  old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
-  fp->_IO_file_flags &= ~_IO_ERR_SEEN;
+  old_error = fp->_flags & _IO_ERR_SEEN;
+  fp->_flags &= ~_IO_ERR_SEEN;
   count = _IO_getwline (fp, buf, n - 1, L'\n', 1);
   /* If we read in some bytes and errno is EAGAIN, that error will
      be reported for next read. */
@@ -60,7 +60,7 @@ fgetws (wchar_t *buf, int n, FILE *fp)
       buf[count] = '\0';
       result = buf;
     }
-  fp->_IO_file_flags |= old_error;
+  fp->_flags |= old_error;
   _IO_release_lock (fp);
   return result;
 }
diff --git a/libio/iofgetws_u.c b/libio/iofgetws_u.c
index a930b47a6df..46431a278b5 100644
--- a/libio/iofgetws_u.c
+++ b/libio/iofgetws_u.c
@@ -47,19 +47,18 @@ fgetws_unlocked (wchar_t *buf, int n, FILE *fp)
   /* This is very tricky since a file descriptor may be in the
      non-blocking mode. The error flag doesn't mean much in this
      case. We return an error only when there is a new error. */
-  old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
-  fp->_IO_file_flags &= ~_IO_ERR_SEEN;
+  old_error = fp->_flags & _IO_ERR_SEEN;
+  fp->_flags &= ~_IO_ERR_SEEN;
   count = _IO_getwline (fp, buf, n - 1, L'\n', 1);
   /* If we read in some bytes and errno is EAGAIN, that error will
      be reported for next read. */
-  if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN)
-		     && errno != EAGAIN))
+  if (count == 0 || ((fp->_flags & _IO_ERR_SEEN) && errno != EAGAIN))
     result = NULL;
   else
     {
       buf[count] = '\0';
       result = buf;
     }
-  fp->_IO_file_flags |= old_error;
+  fp->_flags |= old_error;
   return result;
 }
diff --git a/libio/iogets.c b/libio/iogets.c
index 19048f6d03d..c2223e6ecc0 100644
--- a/libio/iogets.c
+++ b/libio/iogets.c
@@ -48,17 +48,17 @@ _IO_gets (char *buf)
       /* This is very tricky since a file descriptor may be in the
 	 non-blocking mode. The error flag doesn't mean much in this
 	 case. We return an error only when there is a new error. */
-      int old_error = _IO_stdin->_IO_file_flags & _IO_ERR_SEEN;
-      _IO_stdin->_IO_file_flags &= ~_IO_ERR_SEEN;
+      int old_error = _IO_stdin->_flags & _IO_ERR_SEEN;
+      _IO_stdin->_flags &= ~_IO_ERR_SEEN;
       buf[0] = (char) ch;
       count = _IO_getline (_IO_stdin, buf + 1, INT_MAX, '\n', 0) + 1;
-      if (_IO_stdin->_IO_file_flags & _IO_ERR_SEEN)
+      if (_IO_stdin->_flags & _IO_ERR_SEEN)
 	{
 	  retval = NULL;
 	  goto unlock_return;
 	}
       else
-	_IO_stdin->_IO_file_flags |= old_error;
+	_IO_stdin->_flags |= old_error;
     }
   buf[count] = 0;
   retval = buf;
diff --git a/libio/iosetvbuf.c b/libio/iosetvbuf.c
index b29a93be548..a35d866d827 100644
--- a/libio/iosetvbuf.c
+++ b/libio/iosetvbuf.c
@@ -39,7 +39,7 @@ _IO_setvbuf (FILE *fp, char *buf, int mode, size_t size)
   switch (mode)
     {
     case _IOFBF:
-      fp->_IO_file_flags &= ~(_IO_LINE_BUF|_IO_UNBUFFERED);
+      fp->_flags &= ~(_IO_LINE_BUF|_IO_UNBUFFERED);
       if (buf == NULL)
 	{
 	  if (fp->_IO_buf_base == NULL)
@@ -62,15 +62,15 @@ _IO_setvbuf (FILE *fp, char *buf, int mode, size_t size)
 		  result = EOF;
 		  goto unlock_return;
 		}
-	      fp->_IO_file_flags &= ~_IO_LINE_BUF;
+	      fp->_flags &= ~_IO_LINE_BUF;
 	    }
 	  result = 0;
 	  goto unlock_return;
 	}
       break;
     case _IOLBF:
-      fp->_IO_file_flags &= ~_IO_UNBUFFERED;
-      fp->_IO_file_flags |= _IO_LINE_BUF;
+      fp->_flags &= ~_IO_UNBUFFERED;
+      fp->_flags |= _IO_LINE_BUF;
       if (buf == NULL)
 	{
 	  result = 0;
@@ -78,8 +78,8 @@ _IO_setvbuf (FILE *fp, char *buf, int mode, size_t size)
 	}
       break;
     case _IONBF:
-      fp->_IO_file_flags &= ~_IO_LINE_BUF;
-      fp->_IO_file_flags |= _IO_UNBUFFERED;
+      fp->_flags &= ~_IO_LINE_BUF;
+      fp->_flags |= _IO_UNBUFFERED;
       buf = NULL;
       size = 0;
       break;
diff --git a/libio/libio.h b/libio/libio.h
index a3c679ca666..d1516185667 100644
--- a/libio/libio.h
+++ b/libio/libio.h
@@ -60,9 +60,6 @@ typedef union
 
 #include <shlib-compat.h>
 
-/* compatibility defines */
-#define _IO_file_flags _flags
-
 /* open modes */
 #define _IOS_INPUT	1
 #define _IOS_OUTPUT	2
diff --git a/libio/libioP.h b/libio/libioP.h
index 5064bdf69d4..ee23296ddba 100644
--- a/libio/libioP.h
+++ b/libio/libioP.h
@@ -761,7 +761,7 @@ extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf;
 #else
 /* This is part of the kludge for binary compatibility with old stdio. */
 # define COERCE_FILE(FILE) \
-  (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \
+  (((FILE)->_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \
     && (FILE) = *(FILE**)&((int*)fp)[1])
 #endif
 
@@ -775,7 +775,7 @@ extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf;
 # define CHECK_FILE(FILE, RET) \
 	if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \
 	else { COERCE_FILE(FILE); \
-	       if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
+	       if (((FILE)->_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
 	  { MAYBE_SET_EINVAL; return RET; }}
 #else
 # define CHECK_FILE(FILE, RET) COERCE_FILE (FILE)
diff --git a/libio/oldfileops.c b/libio/oldfileops.c
index 5b6e81c4967..5a0f246411c 100644
--- a/libio/oldfileops.c
+++ b/libio/oldfileops.c
@@ -102,7 +102,7 @@ _IO_old_file_init_internal (struct _IO_FILE_plus *fp)
      of our file descriptor.  Hence we actually don't know the actual
      position before we do the first fseek (and until a following fflush). */
   fp->file._old_offset = _IO_pos_BAD;
-  fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS;
+  fp->file._flags |= CLOSED_FILEBUF_FLAGS;
 
   _IO_link_in (fp);
   fp->file._vtable_offset = ((int) sizeof (struct _IO_FILE)
diff --git a/libio/oldiofclose.c b/libio/oldiofclose.c
index 432a7dd89a4..f414502fe01 100644
--- a/libio/oldiofclose.c
+++ b/libio/oldiofclose.c
@@ -46,11 +46,11 @@ _IO_old_fclose (FILE *fp)
     return _IO_new_fclose (fp);
 
   /* First unlink the stream.  */
-  if (fp->_IO_file_flags & _IO_IS_FILEBUF)
+  if (fp->_flags & _IO_IS_FILEBUF)
     _IO_un_link ((struct _IO_FILE_plus *) fp);
 
   _IO_acquire_lock (fp);
-  if (fp->_IO_file_flags & _IO_IS_FILEBUF)
+  if (fp->_flags & _IO_IS_FILEBUF)
     status = _IO_old_file_close_it (fp);
   else
     status = fp->_flags & _IO_ERR_SEEN ? -1 : 0;
@@ -60,7 +60,7 @@ _IO_old_fclose (FILE *fp)
     _IO_free_backup_area (fp);
   if (fp != _IO_stdin && fp != _IO_stdout && fp != _IO_stderr)
     {
-      fp->_IO_file_flags = 0;
+      fp->_flags = 0;
       free(fp);
     }
 
diff --git a/libio/strfile.h b/libio/strfile.h
index b96fd0fb0ae..46ac81809a3 100644
--- a/libio/strfile.h
+++ b/libio/strfile.h
@@ -59,7 +59,7 @@ typedef struct _IO_strfile_
 
 /* frozen: set when the program has requested that the array object not
    be altered, reallocated, or freed. */
-#define _IO_STR_FROZEN(FP) ((FP)->_f._IO_file_flags & _IO_USER_BUF)
+#define _IO_STR_FROZEN(FP) ((FP)->_f._flags & _IO_USER_BUF)
 
 typedef struct
 {
diff --git a/libio/strops.c b/libio/strops.c
index adfa80749c1..eddd722c093 100644
--- a/libio/strops.c
+++ b/libio/strops.c
@@ -74,7 +74,7 @@ void
 _IO_str_init_readonly (_IO_strfile *sf, const char *ptr, int size)
 {
   _IO_str_init_static_internal (sf, (char *) ptr, size < 0 ? -1 : size, NULL);
-  sf->_sbf._f._IO_file_flags |= _IO_NO_WRITES;
+  sf->_sbf._f._flags |= _IO_NO_WRITES;
 }
 
 int
diff --git a/stdio-common/vfprintf.c b/stdio-common/vfprintf.c
index 27d3a2c1bf7..8f0a6f8cf28 100644
--- a/stdio-common/vfprintf.c
+++ b/stdio-common/vfprintf.c
@@ -62,7 +62,7 @@
 	  return -1;							      \
 	}								      \
     } while (0)
-#define UNBUFFERED_P(S) ((S)->_IO_file_flags & _IO_UNBUFFERED)
+#define UNBUFFERED_P(S) ((S)->_flags & _IO_UNBUFFERED)
 
 #define done_add(val) \
   do {									      \
@@ -2307,7 +2307,7 @@ buffered_vfprintf (FILE *s, const CHAR_T *format, va_list args)
   _IO_setp (hp, buf, buf + sizeof buf);
   hp->_mode = -1;
 #endif
-  hp->_IO_file_flags = _IO_MAGIC|_IO_NO_READS|_IO_USER_LOCK;
+  hp->_flags = _IO_MAGIC|_IO_NO_READS|_IO_USER_LOCK;
 #if _IO_JUMPS_OFFSET
   hp->_vtable_offset = 0;
 #endif
