1 files changed, 2 insertions, 0 deletions
diff --git a/libio/ferror_u.c b/libio/ferror_u.c
index bee668d6d9..df550d9d4d 100644
--- a/libio/ferror_u.c
+++ b/libio/ferror_u.c
@@ -24,6 +24,8 @@ the executable file might be covered by the GNU General Public License. */
 #include "libioP.h"
 #include "stdio.h"
 
+#undef ferror_unlocked
+
 int
 ferror_unlocked (fp)
      _IO_FILE* fp;