diff --git a/common/Makefile b/common/Makefile
index 1e5aac8..1531443 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.20 2014/07/27 04:38:03 dholland Exp $
+#	$NetBSD: Makefile,v 1.21 2019/10/13 07:28:19 mrg Exp $
 
 LIBISPRIVATE=	yes
 
@@ -21,3 +21,5 @@ version.c: VERSION
 .include <bsd.lib.mk>
 
 COPTS.print.c+=	-Wno-pointer-sign
+
+COPTS.pf.c+=	${GCC_NO_STRINGOP_TRUNCATION}
diff --git a/mopd/Makefile b/mopd/Makefile
index caf04bc..ca9799c 100644
--- a/mopd/Makefile
+++ b/mopd/Makefile
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.12 2012/08/10 12:10:29 joerg Exp $
+#	$NetBSD: Makefile,v 1.13 2019/10/13 07:28:19 mrg Exp $
 
 PROG=	mopd
 SRCS=	mopd.c process.c
@@ -9,4 +9,4 @@ DPADD+=	${LIBUTIL}
 
 .include <bsd.prog.mk>
 
-COPTS.process.c+=	-Wno-pointer-sign
+COPTS.process.c+=	-Wno-pointer-sign ${GCC_NO_FORMAT_TRUNCATION}