diff --git a/applets/taskmanager/plugin/backend.cpp b/applets/taskmanager/plugin/backend.cpp
--- a/applets/taskmanager/plugin/backend.cpp
+++ b/applets/taskmanager/plugin/backend.cpp
@@ -125,6 +125,14 @@
             continue;
         }
 
+        // Filter out actions explicitly hidden for "KDE", we deliberately do not follow
+        // the OnlyShowIn key as most 3rd party applications needlessly restrict their
+        // actions to Unity and then we couldn't benefit from them anymore
+        const QStringList &notShowIn = actionGroup.readXdgListEntry(QStringLiteral("NotShowIn"));
+        if (notShowIn.contains(QLatin1String("KDE"))) {
+            continue;
+        }
+
         const QString &name = actionGroup.readEntry(QStringLiteral("Name"));
         const QString &exec = actionGroup.readEntry(QStringLiteral("Exec"));
         if (name.isEmpty() || exec.isEmpty()) {