diff --git a/NEWS b/NEWS
index edf7739293..974ed39e4d 100644
--- a/NEWS
+++ b/NEWS
@@ -45,6 +45,9 @@ Deprecated and removed features, and other changes affecting compatibility:
 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
   and <sys/stropts.h> have been removed.
 
+* The obsolete functions bcmp, bcopy, bzero, index, and rindex are no
+  longer declared in <string.h>, only <strings.h>.
+
 * The typedefs u_int8_t, u_int16_t, u_int32_t, u_int64_t, and register_t
   are no longer defined by <sys/types.h> in strict conformance modes.
   These types were historically provided by <sys/types.h> on BSD systems,
diff --git a/debug/tst-chk1.c b/debug/tst-chk1.c
index c6f11af1ff..014b08fab7 100644
--- a/debug/tst-chk1.c
+++ b/debug/tst-chk1.c
@@ -30,6 +30,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <unistd.h>
 #include <wchar.h>
 #include <sys/poll.h>
diff --git a/include/bits/strings_x2k8.h b/include/bits/strings_x2k8.h
new file mode 100644
index 0000000000..7eddd92d93
--- /dev/null
+++ b/include/bits/strings_x2k8.h
@@ -0,0 +1 @@
+#include <string/bits/strings_x2k8.h>
diff --git a/scripts/check-obsolete-constructs.py b/scripts/check-obsolete-constructs.py
index e95e587d3e..bd5a97f76b 100755
--- a/scripts/check-obsolete-constructs.py
+++ b/scripts/check-obsolete-constructs.py
@@ -506,7 +506,6 @@ HEADER_ALLOWED_INCLUDES = {
     "inttypes.h":                  [ "stdint.h" ],
     "signal.h":                    [ "sys/ucontext.h" ],
     "stdlib.h":                    [ "alloca.h", "sys/types.h" ],
-    "string.h":                    [ "strings.h" ],
     "tgmath.h":                    [ "complex.h", "math.h" ],
     "threads.h":                   [ "time.h" ],
 
diff --git a/string/Makefile b/string/Makefile
index 3e5721e0f4..c9ebede768 100644
--- a/string/Makefile
+++ b/string/Makefile
@@ -23,7 +23,7 @@ subdir	:= string
 include ../Makeconfig
 
 headers		:= string.h bits/string_fortified.h			\
-		   strings.h bits/strings_fortified.h			\
+		   strings.h bits/strings_x2k8.h bits/strings_fortified.h \
 		   byteswap.h bits/byteswap.h				\
 		   endian.h bits/endian.h bits/endianness.h		\
 		   bits/uintn-identity.h				\
diff --git a/string/bits/strings_x2k8.h b/string/bits/strings_x2k8.h
new file mode 100644
index 0000000000..dbcb0b2c31
--- /dev/null
+++ b/string/bits/strings_x2k8.h
@@ -0,0 +1,70 @@
+/* Copyright (C) 2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _BITS_STRINGS_X2K8_H
+#define _BITS_STRINGS_X2K8_H 1
+
+/* This header file declares all of the strings.h functions that are
+   not marked as "obsolete" in POSIX.1-2008.  As a GNU extension,
+   these functions are also made available via string.h.  */
+
+#if !defined _STRING_H && !defined _STRINGS_H
+# error "Never include <bits/strings_x2k8.h> directly, use <string(s).h>."
+#endif
+
+__BEGIN_DECLS
+
+/* Compare S1 and S2, ignoring case.  */
+extern int strcasecmp (const char *__s1, const char *__s2)
+     __THROW __attribute_pure__ __nonnull ((1, 2));
+
+/* Compare no more than N chars of S1 and S2, ignoring case.  */
+extern int strncasecmp (const char *__s1, const char *__s2, size_t __n)
+     __THROW __attribute_pure__ __nonnull ((1, 2));
+
+#ifdef	__USE_XOPEN2K8
+/* POSIX.1-2008 extended locale interface (see locale.h).  */
+# include <bits/types/locale_t.h>
+
+/* Compare S1 and S2, ignoring case, using collation rules from LOC.  */
+extern int strcasecmp_l (const char *__s1, const char *__s2, locale_t __loc)
+     __THROW __attribute_pure__ __nonnull ((1, 2, 3));
+
+/* Compare no more than N chars of S1 and S2, ignoring case, using
+   collation rules from LOC.  */
+extern int strncasecmp_l (const char *__s1, const char *__s2,
+			  size_t __n, locale_t __loc)
+     __THROW __attribute_pure__ __nonnull ((1, 2, 4));
+#endif
+
+#if defined __USE_MISC || !defined __USE_XOPEN2K8 || defined __USE_XOPEN2K8XSI
+/* Return the position of the first bit set in I, or 0 if none are set.
+   The least-significant bit is position 1, the most-significant 32.  */
+extern int ffs (int __i) __THROW __attribute_const__;
+#endif
+
+/* The following two functions are non-standard but necessary for non-32 bit
+   platforms.  */
+#ifdef	__USE_MISC
+extern int ffsl (long int __l) __THROW __attribute_const__;
+__extension__ extern int ffsll (long long int __ll)
+     __THROW __attribute_const__;
+#endif
+
+__END_DECLS
+
+#endif /* bits/strings_x2k8.h */
diff --git a/string/string.h b/string/string.h
index 2cc4f50090..6c9cdc0780 100644
--- a/string/string.h
+++ b/string/string.h
@@ -426,7 +426,7 @@ extern char *strerror_l (int __errnum, locale_t __l) __THROW;
 #endif
 
 #ifdef __USE_MISC
-# include <strings.h>
+# include <bits/strings_x2k8.h>
 
 /* Set N bytes of S to 0.  The compiler will not delete a call to this
    function, even if S is dead after the call.  */
diff --git a/string/strings.h b/string/strings.h
index 17e1bf737f..bec458f1d7 100644
--- a/string/strings.h
+++ b/string/strings.h
@@ -21,6 +21,8 @@
 #include <features.h>
 #include <bits/types/size_t.h>
 
+#include <bits/strings_x2k8.h>
+
 /* Tell the caller that we provide correct C++ prototypes.  */
 #if defined __cplusplus && __GNUC_PREREQ (4, 4)
 # define __CORRECT_ISO_CPP_STRINGS_H_PROTO
@@ -97,43 +99,6 @@ extern char *rindex (const char *__s, int __c)
 # endif
 #endif
 
-#if defined __USE_MISC || !defined __USE_XOPEN2K8 || defined __USE_XOPEN2K8XSI
-/* Return the position of the first bit set in I, or 0 if none are set.
-   The least-significant bit is position 1, the most-significant 32.  */
-extern int ffs (int __i) __THROW __attribute_const__;
-#endif
-
-/* The following two functions are non-standard but necessary for non-32 bit
-   platforms.  */
-# ifdef	__USE_MISC
-extern int ffsl (long int __l) __THROW __attribute_const__;
-__extension__ extern int ffsll (long long int __ll)
-     __THROW __attribute_const__;
-# endif
-
-/* Compare S1 and S2, ignoring case.  */
-extern int strcasecmp (const char *__s1, const char *__s2)
-     __THROW __attribute_pure__ __nonnull ((1, 2));
-
-/* Compare no more than N chars of S1 and S2, ignoring case.  */
-extern int strncasecmp (const char *__s1, const char *__s2, size_t __n)
-     __THROW __attribute_pure__ __nonnull ((1, 2));
-
-#ifdef	__USE_XOPEN2K8
-/* POSIX.1-2008 extended locale interface (see locale.h).  */
-# include <bits/types/locale_t.h>
-
-/* Compare S1 and S2, ignoring case, using collation rules from LOC.  */
-extern int strcasecmp_l (const char *__s1, const char *__s2, locale_t __loc)
-     __THROW __attribute_pure__ __nonnull ((1, 2, 3));
-
-/* Compare no more than N chars of S1 and S2, ignoring case, using
-   collation rules from LOC.  */
-extern int strncasecmp_l (const char *__s1, const char *__s2,
-			  size_t __n, locale_t __loc)
-     __THROW __attribute_pure__ __nonnull ((1, 2, 4));
-#endif
-
 __END_DECLS
 
 #if __GNUC_PREREQ (3,4) && __USE_FORTIFY_LEVEL > 0 \
diff --git a/string/test-string.h b/string/test-string.h
index befd3e9931..2c1c01699c 100644
--- a/string/test-string.h
+++ b/string/test-string.h
@@ -55,6 +55,7 @@ extern impl_t __start_impls[], __stop_impls[];
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <sys/mman.h>
 #include <sys/param.h>
 #include <unistd.h>
diff --git a/sysdeps/i386/i686/multiarch/bcopy.c b/sysdeps/i386/i686/multiarch/bcopy.c
index c2d1d25710..e1cd57c6e9 100644
--- a/sysdeps/i386/i686/multiarch/bcopy.c
+++ b/sysdeps/i386/i686/multiarch/bcopy.c
@@ -21,6 +21,7 @@
 #if IS_IN (libc)
 # define bcopy __redirect_bcopy
 # include <string.h>
+# include <strings.h>
 # undef bcopy
 
 # define SYMBOL_NAME bcopy
diff --git a/sysdeps/i386/i686/multiarch/bzero.c b/sysdeps/i386/i686/multiarch/bzero.c
index 6b4834e9de..182a496af6 100644
--- a/sysdeps/i386/i686/multiarch/bzero.c
+++ b/sysdeps/i386/i686/multiarch/bzero.c
@@ -21,6 +21,7 @@
 #if IS_IN (libc)
 # define bzero __redirect_bzero
 # include <string.h>
+# include <strings.h>
 # undef bzero
 
 # define SYMBOL_NAME bzero
diff --git a/sysdeps/i386/i686/multiarch/ifunc-impl-list.c b/sysdeps/i386/i686/multiarch/ifunc-impl-list.c
index e2428e0b11..5408aec908 100644
--- a/sysdeps/i386/i686/multiarch/ifunc-impl-list.c
+++ b/sysdeps/i386/i686/multiarch/ifunc-impl-list.c
@@ -18,6 +18,7 @@
 
 #include <assert.h>
 #include <string.h>
+#include <strings.h>
 #include <wchar.h>
 #include <ifunc-impl-list.h>
 #include "init-arch.h"
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
index 16a64beb33..ac6784a61b 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
@@ -18,6 +18,7 @@
 
 #include <assert.h>
 #include <string.h>
+#include <strings.h>
 #include <wchar.h>
 #include <ldsodefs.h>
 #include <ifunc-impl-list.h>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/bcopy-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/bcopy-ppc64.c
index 6772e0a867..9ba96f7d45 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/bcopy-ppc64.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/bcopy-ppc64.c
@@ -17,6 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <string.h>
+#include <strings.h>
 
 extern __typeof (bcopy)   __bcopy_ppc attribute_hidden;
 extern __typeof (memmove) __memmove_ppc attribute_hidden;
diff --git a/sysdeps/powerpc/powerpc64/multiarch/bcopy.c b/sysdeps/powerpc/powerpc64/multiarch/bcopy.c
index 8c6f2fbf8e..b402117cb3 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/bcopy.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/bcopy.c
@@ -17,6 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <string.h>
+#include <strings.h>
 #include "init-arch.h"
 
 extern __typeof (bcopy) __bcopy_ppc attribute_hidden;
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index c0a927d73e..c6a227f0e1 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -18,6 +18,7 @@
 
 #include <assert.h>
 #include <string.h>
+#include <strings.h>
 #include <wchar.h>
 #include <ldsodefs.h>
 #include <ifunc-impl-list.h>
diff --git a/sysdeps/s390/bzero.c b/sysdeps/s390/bzero.c
index 5477ed4aad..18f7eb8932 100644
--- a/sysdeps/s390/bzero.c
+++ b/sysdeps/s390/bzero.c
@@ -19,6 +19,7 @@
 #include <ifunc-memset.h>
 #if HAVE_MEMSET_IFUNC
 # include <string.h>
+# include <strings.h>
 # include <ifunc-resolve.h>
 
 # if HAVE_MEMSET_Z900_G5
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index 1948436417..bede348ee5 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -18,6 +18,7 @@
 
 #include <assert.h>
 #include <string.h>
+#include <strings.h>
 #include <wchar.h>
 #include <ifunc-impl-list.h>
 #include <ifunc-resolve.h>
diff --git a/sysdeps/sparc/sparc64/multiarch/bzero.c b/sysdeps/sparc/sparc64/multiarch/bzero.c
index 2d7c06b325..3801d8d0ef 100644
--- a/sysdeps/sparc/sparc64/multiarch/bzero.c
+++ b/sysdeps/sparc/sparc64/multiarch/bzero.c
@@ -20,6 +20,7 @@
 #if IS_IN (libc)
 # define bzero __redirect_bzero
 # include <string.h>
+# include <strings.h>
 # undef bzero
 
 # include <sparc-ifunc.h>
diff --git a/sysdeps/sparc/sparc64/multiarch/ifunc-impl-list.c b/sysdeps/sparc/sparc64/multiarch/ifunc-impl-list.c
index 00ed640fbf..8326a7b421 100644
--- a/sysdeps/sparc/sparc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/sparc/sparc64/multiarch/ifunc-impl-list.c
@@ -18,6 +18,7 @@
 
 #include <assert.h>
 #include <string.h>
+#include <strings.h>
 #include <wchar.h>
 #include <ldsodefs.h>
 #include <sysdep.h>
