diff --git a/Modules/TopBar/WorkspaceSwitcher.qml b/Modules/TopBar/WorkspaceSwitcher.qml
index abe32cb7..f1285442 100644
--- a/Modules/TopBar/WorkspaceSwitcher.qml
+++ b/Modules/TopBar/WorkspaceSwitcher.qml
@@ -80,7 +80,7 @@ Rectangle {
                              return
                          }
 
-                         const keyBase = (w.appId || w.class || w.windowClass || "unknown").toLowerCase()
+                         const keyBase = (w.app_id || w.appId || w.class || w.windowClass || "unknown").toLowerCase()
                          const key = isActiveWs ? `${keyBase}_${i}` : keyBase
 
                          if (!byApp[key]) {