diff --git a/designer-base/src/main/java/com/fr/design/mainframe/DesignerFrame.java b/designer-base/src/main/java/com/fr/design/mainframe/DesignerFrame.java
index 01a7defb2..890b6fa04 100644
--- a/designer-base/src/main/java/com/fr/design/mainframe/DesignerFrame.java
+++ b/designer-base/src/main/java/com/fr/design/mainframe/DesignerFrame.java
@@ -72,6 +72,8 @@ import com.fr.start.OemHandler;
 import com.fr.workspace.WorkContext;
 import com.fr.workspace.Workspace;
 import com.fr.workspace.connect.WorkspaceConnectionInfo;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.concurrent.CopyOnWriteArrayList;
 import org.jetbrains.annotations.Nullable;
 
@@ -179,6 +181,8 @@ public class DesignerFrame extends JFrame implements JTemplateActionListener, Ta
 
     private int contentHeight = (int) (java.awt.Toolkit.getDefaultToolkit().getScreenSize().getHeight());
 
+    private Map<WindowListener, SafeWindowListener> map = new HashMap<>();
+
     private WindowAdapter windowAdapter = new WindowAdapter() {
 
         @Override