diff --git a/prog_limit.c b/prog_limit.c
--- a/prog_limit.c
+++ b/prog_limit.c
@@ -20,7 +20,7 @@
     if (argc < 3) {
         printf ("Usage: %s <mem> <cmd> [args]...\n", argv[0]);
         printf ("Report bugs to mbroeker@largo.homelinux.org\n");
-        return EXIT_SUCCESS;
+        return EXIT_FAILURE;
     }
 
     if ((args = calloc ((argc - 2), sizeof (char *))) == NULL) {