diff --git a/git-merge.sh b/git-merge.sh
index 5b34b4de99..789f4de595 100755
--- a/git-merge.sh
+++ b/git-merge.sh
@@ -93,6 +93,8 @@ finish () {
 	esac
 }
 
+case "$#" in 0) usage ;; esac
+
 rloga=
 while case "$#" in 0) break ;; esac
 do