diff --git a/tools/regression/sockets/unix_gc/Makefile b/tools/regression/sockets/unix_gc/Makefile
index 0c66493fa823..184660965069 100644
--- a/tools/regression/sockets/unix_gc/Makefile
+++ b/tools/regression/sockets/unix_gc/Makefile
@@ -2,6 +2,6 @@
 
 PROG=	unix_gc
 MAN=
-WARNS?=	3
+WARNS?=	6
 
 .include <bsd.prog.mk>
diff --git a/tools/regression/sockets/unix_gc/unix_gc.c b/tools/regression/sockets/unix_gc/unix_gc.c
index 8cae2d97a94e..e378f3aee0ec 100644
--- a/tools/regression/sockets/unix_gc/unix_gc.c
+++ b/tools/regression/sockets/unix_gc/unix_gc.c
@@ -752,7 +752,7 @@ recursion(void)
 
 #define	RMDIR	"rm -Rf "
 int
-main(int argc, char *argv[])
+main(void)
 {
 	char cmd[sizeof(RMDIR) + PATH_MAX];
 	int serrno;