diff --git a/lib/client.js b/lib/client.js
index 8ea601f7e..2468e2de5 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -191,6 +191,14 @@ MatrixClient.prototype.getIdentityServerUrl = function() {
     return this.idBaseUrl;
 };
 
+/**
+ * Get the domain for this client's MXID
+ * @return {string} Domain of this MXID
+ */
+MatrixClient.prototype.getDomain = function() {
+    return this.credentials.userId.replace(/^.*:/, '');
+};
+
 /**
  * Check if the runtime environment supports VoIP calling.
  * @return {boolean} True if VoIP is supported.