diff --git a/packages/platform-browser/src/dom/events/key_events.ts b/packages/platform-browser/src/dom/events/key_events.ts
index 2b13c3e381..8ac3859fbe 100644
--- a/packages/platform-browser/src/dom/events/key_events.ts
+++ b/packages/platform-browser/src/dom/events/key_events.ts
@@ -111,7 +111,7 @@ export class KeyEventsPlugin extends EventManagerPlugin {
     });
   }
 
-  static parseEventName(eventName: string): {fullKey: string, domEventName: string}|null {
+  static parseEventName(eventName: string): {[key: string]: string}|null {
     const parts: string[] = eventName.toLowerCase().split('.');
 
     const domEventName = parts.shift();
@@ -136,7 +136,10 @@ export class KeyEventsPlugin extends EventManagerPlugin {
       return null;
     }
 
-    return {domEventName, fullKey};
+    const result: {[k: string]: string} = {};
+    result['domEventName'] = domEventName;
+    result['fullKey'] = fullKey;
+    return result;
   }
 
   static getEventFullKey(event: KeyboardEvent): string {