diff --git a/types/dispatchr/addons/BaseStore.d.ts b/types/dispatchr/addons/BaseStore.d.ts
index 0c1c577a3f..6507a7fcf4 100644
--- a/types/dispatchr/addons/BaseStore.d.ts
+++ b/types/dispatchr/addons/BaseStore.d.ts
@@ -5,7 +5,7 @@ import { EventEmitter } from 'events';
 
 declare class BaseStore<S = {}> extends EventEmitter implements Store<S> {
     constructor(dispatcher: DispatcherInterface);
-    initialize?: () => void;
+    initialize?(): void;
     getContext(): DispatcherContext;
     addChangeListener(callback: () => void): void;
     removeChangeListener(callback: () => void): void;