diff --git a/include/libiberty.h b/include/libiberty.h
index d4e8791b14ba..4ec9b9afd177 100644
--- a/include/libiberty.h
+++ b/include/libiberty.h
@@ -215,10 +215,6 @@ extern int ffs(int);
 extern int mkstemps(char *, int);
 #endif
 
-#if defined (HAVE_DECL_MKSTEMPS) && !HAVE_DECL_MKSTEMPS
-extern int mkstemps(char *, int);
-#endif
-
 /* Make memrchr available on systems that do not have it.  */
 #if !defined (__GNU_LIBRARY__ ) && !defined (__linux__) && \
     !defined (HAVE_MEMRCHR)