diff --git a/fork b/fork
index 46f0bfc..e238975 100755
--- a/fork
+++ b/fork
@@ -9,7 +9,8 @@
 
 
 if [ -z "$@" ]; then
-	printf "$0: requires argument\\n"
+	printf "fork: requires argument\\n"
+	exit 1
 fi
 (
 exec 0>/dev/null 1>&0 2>&0 "$@"