diff --git a/src/vs/platform/contextkey/browser/contextKeyService.ts b/src/vs/platform/contextkey/browser/contextKeyService.ts
index 6ae09c69ed2..20e6021ff6d 100644
--- a/src/vs/platform/contextkey/browser/contextKeyService.ts
+++ b/src/vs/platform/contextkey/browser/contextKeyService.ts
@@ -117,7 +117,7 @@ class ConfigAwareContextValuesContainer extends Context {
 
 					const cachedItems = this._values.findSuperstr(contextKey);
 					if (cachedItems !== undefined) {
-						changedKeys.push(...[...Iterable.map(cachedItems, ([key]) => key)]);
+						changedKeys.push(...Iterable.map(cachedItems, ([key]) => key));
 						this._values.deleteSuperstr(contextKey);
 					}