diff --git a/platform/platform-impl/src/com/intellij/openapi/wm/impl/welcomeScreen/FlatWelcomeFrame.java b/platform/platform-impl/src/com/intellij/openapi/wm/impl/welcomeScreen/FlatWelcomeFrame.java
index acd1671787b0..8e77ae2ece2c 100644
--- a/platform/platform-impl/src/com/intellij/openapi/wm/impl/welcomeScreen/FlatWelcomeFrame.java
+++ b/platform/platform-impl/src/com/intellij/openapi/wm/impl/welcomeScreen/FlatWelcomeFrame.java
@@ -154,6 +154,14 @@ public class FlatWelcomeFrame extends JFrame implements IdeFrame, Disposable, Ac
     UIUtil.decorateWindowHeader(getRootPane());
   }
 
+  @Override
+  public void addNotify() {
+    if (IdeFrameDecorator.isCustomDecoration()) {
+      JdkEx.setHasCustomDecoration(this);
+    }
+    super.addNotify();
+  }
+
   @Override
   public void dispose() {
     if (myDisposed) {