diff --git a/core/display.js b/core/display.js
index 1f342a9e..fe765f3d 100644
--- a/core/display.js
+++ b/core/display.js
@@ -1335,6 +1335,7 @@ export default class Display {
                                 }
                                 break;
                             case 'img':
+                            case '_img':
                                 secondaryScreenRects++;
                                 if (this._screens[screenLocation.screenIndex].channel) {
                                     this._screens[screenLocation.screenIndex].channel.postMessage({