diff --git a/src/vs/editor/contrib/format/browser/formatActions.ts b/src/vs/editor/contrib/format/browser/formatActions.ts
index e162886c4a0..4844db9cb19 100644
--- a/src/vs/editor/contrib/format/browser/formatActions.ts
+++ b/src/vs/editor/contrib/format/browser/formatActions.ts
@@ -29,7 +29,7 @@ import EditorContextKeys = editorCommon.EditorContextKeys;
 function alertFormattingEdits(edits: editorCommon.ISingleEditOperation[]): void {
 
 	edits = edits.filter(edit => edit.range);
-	if (!edits) {
+	if (!edits.length) {
 		return;
 	}