diff --git a/shell_client.cpp b/shell_client.cpp
--- a/shell_client.cpp
+++ b/shell_client.cpp
@@ -396,6 +396,10 @@
         del = Deleted::create(this);
     }
     emit windowClosed(this, del);
+
+    // Remove Force Temporarily rules.
+    RuleBook::self()->discardUsed(this, true);
+
     destroyWindowManagementInterface();
     destroyDecoration();