diff --git a/src/components/structures/MatrixChat.js b/src/components/structures/MatrixChat.js
index 233ec9e7bb..d6ef3341da 100644
--- a/src/components/structures/MatrixChat.js
+++ b/src/components/structures/MatrixChat.js
@@ -1985,6 +1985,7 @@ export default createReactClass({
                     onLoggedIn={this.onRegisterFlowComplete}
                     onLoginClick={this.onLoginClick}
                     onServerConfigChange={this.onServerConfigChange}
+                    defaultDeviceDisplayName={this.props.defaultDeviceDisplayName}
                     {...this.getServerProperties()}
                 />
             );
diff --git a/src/components/structures/auth/Registration.js b/src/components/structures/auth/Registration.js
index 171d3ada26..8593a4b1e2 100644
--- a/src/components/structures/auth/Registration.js
+++ b/src/components/structures/auth/Registration.js
@@ -2,7 +2,7 @@
 Copyright 2015, 2016 OpenMarket Ltd
 Copyright 2017 Vector Creations Ltd
 Copyright 2018, 2019 New Vector Ltd
-Copyright 2019 The Matrix.org Foundation C.I.C.
+Copyright 2019, 2020 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -62,6 +62,7 @@ export default createReactClass({
         // registration shouldn't know or care how login is done.
         onLoginClick: PropTypes.func.isRequired,
         onServerConfigChange: PropTypes.func.isRequired,
+        defaultDeviceDisplayName: PropTypes.string,
     },
 
     getInitialState: function() {
@@ -432,15 +433,14 @@ export default createReactClass({
         // session).
         if (!this.state.formVals.password) inhibitLogin = null;
 
-        return this.state.matrixClient.register(
-            this.state.formVals.username,
-            this.state.formVals.password,
-            undefined, // session id: included in the auth dict already
-            auth,
-            null,
-            null,
-            inhibitLogin,
-        );
+        const registerParams = {
+            username: this.state.formVals.username,
+            password: this.state.formVals.password,
+            initial_device_display_name: this.props.defaultDeviceDisplayName,
+        };
+        if (auth) registerParams.auth = auth;
+        if (inhibitLogin !== undefined && inhibitLogin !== null) registerParams.inhibitLogin = inhibitLogin;
+        return this.state.matrixClient.registerRequest(registerParams);
     },
 
     _getUIAuthInputs: function() {