diff --git a/make/lib.sh b/make/lib.sh
index e45df48f..2085ad8f 100644
--- a/make/lib.sh
+++ b/make/lib.sh
@@ -46,7 +46,7 @@ function only_in_directory {
 }
 
 function safe_checkout_branch {
-	if "$#" -ne 2
+	if test "$#" -ne 1
 	then
 		echo >&2 "Použití: $0 <branch>"
 		return 1