diff --git a/applets/pager/plugin/pagermodel.cpp b/applets/pager/plugin/pagermodel.cpp
--- a/applets/pager/plugin/pagermodel.cpp
+++ b/applets/pager/plugin/pagermodel.cpp
@@ -595,14 +595,10 @@
                 KWindowSystem::setOnDesktop(id, itemId.toInt());
             }
         } else {
-            QString newActivity;
+            QString newActivity = itemId.toString();
             const QStringList &runningActivities = d->activityInfo->runningActivities();
 
-            if (itemId < runningActivities.length()) {
-                newActivity = itemId.toString();
-            }
-
-            if (newActivity.isEmpty()) {
+            if (!runningActivities.contains(newActivity)) {
                 return;
             }