diff --git a/include/stdio.h b/include/stdio.h
index d6986e154273..e94583097a26 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -270,7 +270,7 @@ size_t	 fwrite(const void * __restrict, size_t, size_t, FILE * __restrict);
 int	 getc(FILE *);
 int	 getchar(void);
 char	*gets(char *);
-#if defined(__EXT1_VISIBLE) && __EXT1_VISIBLE == 1
+#if __EXT1_VISIBLE
 char	*gets_s(char *, rsize_t);
 #endif
 void	 perror(const char *);