diff --git a/src/vs/platform/actions/common/menu.ts b/src/vs/platform/actions/common/menu.ts
index ec4b4a4ae6769ca9d36200bfc55635e050645584..72013076fb1479807bd20c7c951272f08175cb23 100644
--- a/src/vs/platform/actions/common/menu.ts
+++ b/src/vs/platform/actions/common/menu.ts
@@ -56,9 +56,9 @@ export class Menu implements IMenu {
 
 		for (let item of menuItems) {
 			// group by groupId
-			const groupName = item.group;
+			const groupName = item.group || '';
 			if (!group || group[0] !== groupName) {
-				group = [groupName || '', []];
+				group = [groupName, []];
 				this._menuGroups.push(group);
 			}
 			group![1].push(item);