diff --git a/src/components/structures/auth/Registration.js b/src/components/structures/auth/Registration.js
index c74f6ed6e3..dc22516cd8 100644
--- a/src/components/structures/auth/Registration.js
+++ b/src/components/structures/auth/Registration.js
@@ -243,7 +243,7 @@ export default createReactClass({
             });
         };
         try {
-            await this._makeRegisterRequest({});
+            await this._makeRegisterRequest(null);
             // This should never succeed since we specified an empty
             // auth object.
             console.log("Expecting 401 from register request but got success!");
diff --git a/src/components/views/auth/InteractiveAuthEntryComponents.js b/src/components/views/auth/InteractiveAuthEntryComponents.js
index 327451be17..bee99306a3 100644
--- a/src/components/views/auth/InteractiveAuthEntryComponents.js
+++ b/src/components/views/auth/InteractiveAuthEntryComponents.js
@@ -650,7 +650,7 @@ export class SSOAuthEntry extends React.Component {
     };
 
     onConfirmClick = () => {
-        this.props.submitAuthDict({});
+        this.props.submitAuthDict(null);
     };
 
     render() {
@@ -740,7 +740,7 @@ export const FallbackAuthEntry = createReactClass({
             event.data === "authDone" &&
             event.origin === this.props.matrixClient.getHomeserverUrl()
         ) {
-            this.props.submitAuthDict({});
+            this.props.submitAuthDict(null);
         }
     },