--- a/widget/android/nsAppShell.cpp
+++ b/widget/android/nsAppShell.cpp
@@ -411,17 +411,17 @@ nsAppShell::ProcessNextNativeEvent(bool 
         obs->StartSession(
                 nsString(curEvent->Characters()).get(),
                 curEvent->Time()
                 );
         break;
     }
 
     case AndroidGeckoEvent::TELEMETRY_UI_EVENT: {
-        if (curEvent->Characters().Length() == 0)
+        if (curEvent->Data().Length() == 0)
             break;
 
         nsCOMPtr<nsIUITelemetryObserver> obs;
         mBrowserApp->GetUITelemetryObserver(getter_AddRefs(obs));
         if (!obs)
             break;
 
         obs->AddEvent(