diff --git a/bin/expr/Makefile b/bin/expr/Makefile
index 7c7612fcabf5..8f00fdf5ee4d 100644
--- a/bin/expr/Makefile
+++ b/bin/expr/Makefile
@@ -1,6 +1,12 @@
-#	$NetBSD: Makefile,v 1.14 2000/09/19 17:20:00 jdolecek Exp $
+#	$NetBSD: Makefile,v 1.15 2016/04/01 08:19:31 mrg Exp $
 
 PROG=		expr
 SRCS=		expr.y
 
 .include <bsd.prog.mk>
+
+# XXXGCC5
+.if defined(HAVE_GCC) && ${HAVE_GCC} == 53 && ${ACTIVE_CC} == "gcc"
+CFLAGS+= -fwrapv
+.endif
+