diff --git a/src/components/views/auth/InteractiveAuthEntryComponents.js b/src/components/views/auth/InteractiveAuthEntryComponents.js
index 327451be17..4222aa9255 100644
--- a/src/components/views/auth/InteractiveAuthEntryComponents.js
+++ b/src/components/views/auth/InteractiveAuthEntryComponents.js
@@ -740,7 +740,7 @@ export const FallbackAuthEntry = createReactClass({
             event.data === "authDone" &&
             event.origin === this.props.matrixClient.getHomeserverUrl()
         ) {
-            this.props.submitAuthDict({});
+            this.props.submitAuthDict(null);
         }
     },