diff --git a/src/vs/workbench/services/extensions/common/extensionsRegistry.ts b/src/vs/workbench/services/extensions/common/extensionsRegistry.ts
index d37aabe470a791a03c01ee2188c8be316a63bcba..029a08153ba9f6ab7006b9fd18526817d9d2d38d 100644
--- a/src/vs/workbench/services/extensions/common/extensionsRegistry.ts
+++ b/src/vs/workbench/services/extensions/common/extensionsRegistry.ts
@@ -136,7 +136,7 @@ export class ExtensionPoint<T> implements IExtensionPoint<T> {
 	}
 
 	private _handle(): void {
-		if (this._handler === null || this._users === null) {
+		if (this._handler === null || this._users === null || this._delta === null) {
 			return;
 		}