diff --git a/usr.bin/catman/Makefile b/usr.bin/catman/Makefile
index ab4c01453a1b..d80a5fd8ae49 100644
--- a/usr.bin/catman/Makefile
+++ b/usr.bin/catman/Makefile
@@ -1,5 +1,6 @@
 # $FreeBSD$
 
 PROG=	catman
+WARNS?=	6
 
 .include <bsd.prog.mk>
diff --git a/usr.bin/catman/catman.c b/usr.bin/catman/catman.c
index 3298c4101eb1..c43781e77c06 100644
--- a/usr.bin/catman/catman.c
+++ b/usr.bin/catman/catman.c
@@ -710,7 +710,8 @@ determine_locale(void)
 	sep = strchr(locale, '_');
 	if (sep != NULL && isupper((unsigned char)sep[1])
 			&& isupper((unsigned char)sep[2])) {
-		asprintf(&lang_locale, "%.*s%s", sep - locale, locale, &sep[3]);
+		asprintf(&lang_locale, "%.*s%s", (int)(sep - locale),
+		    locale, &sep[3]);
 	}
 	sep = nl_langinfo(CODESET);
 	if (sep != NULL && *sep != '\0' && strcmp(sep, "US-ASCII") != 0) {