diff --git a/git-push-recursive.sh b/git-push-recursive.sh
index 5966ce0..669b979 100755
--- a/git-push-recursive.sh
+++ b/git-push-recursive.sh
@@ -38,7 +38,7 @@ echo ""
 
 echo "=== Enter [commit message] or leave [blank] for default to 'updated'"
 read -p ">>> " COMMIT_MESSAGE
-if [ ! $COMMIT_MESSAGE ]
+if [ ! "$COMMIT_MESSAGE" ]
 then
   COMMIT_MESSAGE="updated"
 fi