diff --git a/usr.sbin/pmc/Makefile b/usr.sbin/pmc/Makefile
index 2f94d3e274ef..090134711b92 100644
--- a/usr.sbin/pmc/Makefile
+++ b/usr.sbin/pmc/Makefile
@@ -1,17 +1,18 @@
 #
 # $FreeBSD$
 #
 
 .include <src.opts.mk>
 PROG_CXX=	pmc
 MAN=	
+WARNS?=	3
 CXXFLAGS+= -O0 -std=c++14
 CWARNFLAGS.gcc+= -Wno-redundant-decls
 
 LIBADD=	kvm pmc m ncursesw pmcstat elf
 
 SRCS=	pmc.c pmc_util.c cmd_pmc_stat.c \
 	cmd_pmc_list.c cmd_pmc_filter.cc \
 	cmd_pmc_summary.cc
 
 .include <bsd.prog.mk>