diff --git a/lib/libregex/Makefile b/lib/libregex/Makefile
index 71d5b2279cb..eb6b0b64650 100644
--- a/lib/libregex/Makefile
+++ b/lib/libregex/Makefile
@@ -10,6 +10,7 @@ SHLIB_MINOR=	0
 CFLAGS+=	-DLIBREGEX
 LIBC_SRCTOP=	${.CURDIR:H}/libc
 SYMBOL_MAPS=	${SYM_MAPS}
+WARNS?=	2
 
 #HAS_TESTS=
 SUBDIR.${MK_TESTS}+= tests