diff --git a/sysdeps/unix/bsd/vax/sysdep.S b/sysdeps/unix/bsd/vax/sysdep.S
index 74c366e4cd..9f39b8248a 100644
--- a/sysdeps/unix/bsd/vax/sysdep.S
+++ b/sysdeps/unix/bsd/vax/sysdep.S
@@ -16,6 +16,7 @@ License along with the GNU C Library; see the file COPYING.LIB.  If
 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
 Cambridge, MA 02139, USA.  */
 
+#define _ERRNO_H
 #include <errnos.h>
 
 .globl _errno