diff --git a/src/components/structures/MatrixChat.js b/src/components/structures/MatrixChat.js
index e3792410b2..c4d3df03d3 100644
--- a/src/components/structures/MatrixChat.js
+++ b/src/components/structures/MatrixChat.js
@@ -507,6 +507,10 @@ module.exports = React.createClass({
                 this._onSetTheme(payload.value);
                 break;
             case 'on_logging_in':
+                // We are now logging in, so set the state to reflect that
+                // and also that we're not ready (we'll be marked as logged
+                // in once the login completes, then ready once the sync
+                // completes).
                 this.setState({loggingIn: true, ready: false});
                 break;
             case 'on_logged_in':