diff --git a/include/features.h b/include/features.h
index 03b83cd34c..673c4036cd 100644
--- a/include/features.h
+++ b/include/features.h
@@ -536,7 +536,7 @@
 /* Decide whether we can define 'extern inline' functions in headers.  */
 #if __GNUC_PREREQ (2, 7) && defined __OPTIMIZE__ \
     && !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__ \
-    && defined __extern_inline
+    && defined __extern_inline && !(defined __clang__ && defined _LIBC)
 # define __USE_EXTERN_INLINES	1
 #endif