diff --git a/src/components/structures/MatrixChat.js b/src/components/structures/MatrixChat.js
index 799cd58d93..80489085ed 100644
--- a/src/components/structures/MatrixChat.js
+++ b/src/components/structures/MatrixChat.js
@@ -655,7 +655,7 @@ module.exports = React.createClass({
             }
         }
         else {
-            console.error("Unknown screen : %s", screen);
+            if (screen) console.error("Unknown screen : %s", screen);
         }
     },