diff --git a/src/client/plasmawindowmodel.h b/src/client/plasmawindowmodel.h
--- a/src/client/plasmawindowmodel.h
+++ b/src/client/plasmawindowmodel.h
@@ -106,7 +106,11 @@
         /**
          * @since 5.53
          */
-        VirtualDesktops
+        VirtualDesktops,
+        /**
+         * @since 5.71
+         */
+        InternalId,
     };
     Q_ENUM(AdditionalRoles)
 
diff --git a/src/client/plasmawindowmodel.cpp b/src/client/plasmawindowmodel.cpp
--- a/src/client/plasmawindowmodel.cpp
+++ b/src/client/plasmawindowmodel.cpp
@@ -269,6 +269,8 @@
         return window->geometry();
     } else if (role == VirtualDesktops) {
         return window->plasmaVirtualDesktops();
+    } else if (role == InternalId) {
+        return window->internalId();
     }
 
     return QVariant();