diff --git a/novnc/app/camera-receiver.js b/novnc/app/camera-receiver.js
index 408991fe325b0bb66588e14e809b08f56bed3740..747a6c8c90c3d313c86d51acdfcf5b8b4b4ff70d 100644
--- a/novnc/app/camera-receiver.js
+++ b/novnc/app/camera-receiver.js
@@ -360,6 +360,7 @@ document.addEventListener('DOMContentLoaded', function() {
         var videoContainer = getVideoContainer(slot);
         if (videoContainer == null) {
             console.log('handleCommand videoContainer element is null');
+            return;
         }
         switch(command) {
             case 'set_geometry_relative_to_window':