diff --git a/appIcons.js b/appIcons.js
index 8bedd98..06ee2e2 100644
--- a/appIcons.js
+++ b/appIcons.js
@@ -372,6 +372,9 @@ var TaskbarAppIcon = GObject.registerClass({
     onWindowsChanged() {
         this._updateWindows();
         this.updateIcon();
+
+        if (this._isGroupApps)
+            this._setIconStyle();
     }
 
     onWindowEnteredOrLeft(display, number, metaWindow) {