diff --git a/src/appfolders.js b/src/appfolders.js
index a1892a7a..db59edd4 100644
--- a/src/appfolders.js
+++ b/src/appfolders.js
@@ -198,17 +198,21 @@ var AppFoldersBlur = class AppFoldersBlur {
 
         if (original_zoomAndFadeIn != null) {
             Main.overview._overview.controls._appDisplay._folderIcons.forEach(icon => {
-                icon._dialog._zoomAndFadeIn = original_zoomAndFadeIn;
+                if (icon._dialog)
+                    icon._dialog._zoomAndFadeIn = original_zoomAndFadeIn;
             });
         }
         if (original_zoomAndFadeOut != null) {
             Main.overview._overview.controls._appDisplay._folderIcons.forEach(icon => {
-                icon._dialog._zoomAndFadeOut = original_zoomAndFadeOut;
+                if (icon._dialog)
+                    icon._dialog._zoomAndFadeOut = original_zoomAndFadeOut;
             });
         }
         Main.overview._overview.controls._appDisplay._folderIcons.forEach(icon => {
-            icon._dialog.remove_effect_by_name("appfolder-blur")
-            icon._dialog._viewBox.remove_style_class_name('transparent-app-folder-dialogs');
+            if (icon._dialog) {
+                icon._dialog.remove_effect_by_name("appfolder-blur")
+                icon._dialog._viewBox.remove_style_class_name('transparent-app-folder-dialogs');
+            }
         });
 
         this.connections.disconnect_all();