diff --git a/resolv/gai_misc.c b/resolv/gai_misc.c
index 5cf6d7c149..3f13dc4520 100644
--- a/resolv/gai_misc.c
+++ b/resolv/gai_misc.c
@@ -28,7 +28,7 @@
 #ifndef gai_create_helper_thread
 # define gai_create_helper_thread __gai_create_helper_thread
 
-extern inline int
+static inline int
 __gai_create_helper_thread (pthread_t *threadp, void *(*tf) (void *),
 			    void *arg)
 {
diff --git a/rt/aio_misc.c b/rt/aio_misc.c
index 724486e66f..639d693418 100644
--- a/rt/aio_misc.c
+++ b/rt/aio_misc.c
@@ -33,7 +33,7 @@
 #ifndef aio_create_helper_thread
 # define aio_create_helper_thread __aio_create_helper_thread
 
-extern inline int
+static inline int
 __aio_create_helper_thread (pthread_t *threadp, void *(*tf) (void *), void *arg)
 {
   pthread_attr_t attr;
diff --git a/sysdeps/mach/hurd/gai_misc.h b/sysdeps/mach/hurd/gai_misc.h
index 0237e59bf6..832c5ae1b6 100644
--- a/sysdeps/mach/hurd/gai_misc.h
+++ b/sysdeps/mach/hurd/gai_misc.h
@@ -22,7 +22,7 @@
 #define gai_start_notify_thread __gai_start_notify_thread
 #define gai_create_helper_thread __gai_create_helper_thread
 
-extern inline void
+static inline void
 __gai_start_notify_thread (void)
 {
   sigset_t ss;
@@ -32,7 +32,7 @@ __gai_start_notify_thread (void)
   assert_perror (sigerr);
 }
 
-extern inline int
+static inline int
 __gai_create_helper_thread (pthread_t *threadp, void *(*tf) (void *),
 			    void *arg)
 {
diff --git a/sysdeps/nptl/gai_misc.h b/sysdeps/nptl/gai_misc.h
index 0416e271f4..8461fa88bf 100644
--- a/sysdeps/nptl/gai_misc.h
+++ b/sysdeps/nptl/gai_misc.h
@@ -76,7 +76,7 @@
 #define gai_start_notify_thread __gai_start_notify_thread
 #define gai_create_helper_thread __gai_create_helper_thread
 
-extern inline void
+static inline void
 __gai_start_notify_thread (void)
 {
   sigset_t ss;
@@ -84,7 +84,7 @@ __gai_start_notify_thread (void)
   (void) __pthread_sigmask (SIG_SETMASK, &ss, NULL);
 }
 
-extern inline int
+static inline int
 __gai_create_helper_thread (pthread_t *threadp, void *(*tf) (void *),
 			    void *arg)
 {
diff --git a/sysdeps/unix/sysv/linux/aio_misc.h b/sysdeps/unix/sysv/linux/aio_misc.h
index 578ff1cf27..81a917f42d 100644
--- a/sysdeps/unix/sysv/linux/aio_misc.h
+++ b/sysdeps/unix/sysv/linux/aio_misc.h
@@ -25,7 +25,7 @@
 # define aio_start_notify_thread __aio_start_notify_thread
 # define aio_create_helper_thread __aio_create_helper_thread
 
-extern inline void
+static inline void
 __aio_start_notify_thread (void)
 {
   sigset_t ss;
@@ -34,7 +34,7 @@ __aio_start_notify_thread (void)
 			 __NSIG_BYTES);
 }
 
-extern inline int
+static inline int
 __aio_create_helper_thread (pthread_t *threadp, void *(*tf) (void *),
 			    void *arg)
 {