diff --git a/tools/tools/cxgbtool/Makefile b/tools/tools/cxgbtool/Makefile
index 5aa08f121961..2fb608d2f410 100644
--- a/tools/tools/cxgbtool/Makefile
+++ b/tools/tools/cxgbtool/Makefile
@@ -6,5 +6,6 @@ MAN=
 CFLAGS+= -I${.CURDIR}/../../../sys/dev/cxgb -I.
 CFLAGS+= -DCONFIG_T3_REGS -DCHELSIO_INTERNAL
 BINDIR?= /usr/sbin
+WARNS?= 3
 
 .include <bsd.prog.mk>