diff --git a/git-merge.sh b/git-merge.sh
index a784e0f2cc..e51e73499a 100755
--- a/git-merge.sh
+++ b/git-merge.sh
@@ -43,7 +43,7 @@ do
 		case "$#,$1" in
 		*,*=*)
 			strategy=`expr "$1" : '-[^=]*=\(.*\)'` ;;
-		0,*)
+		1,*)
 			usage ;;
 		*)
 			strategy="$2"