diff --git a/platform/platform-impl/src/com/intellij/openapi/wm/impl/IdeFrameImpl.java b/platform/platform-impl/src/com/intellij/openapi/wm/impl/IdeFrameImpl.java
index ddb0d4f6ad93..248119431e3a 100644
--- a/platform/platform-impl/src/com/intellij/openapi/wm/impl/IdeFrameImpl.java
+++ b/platform/platform-impl/src/com/intellij/openapi/wm/impl/IdeFrameImpl.java
@@ -455,6 +455,10 @@ public class IdeFrameImpl extends JFrame implements IdeFrame, DataProvider {
     return myBalloonLayout;
   }
 
+  public boolean isInFullScreen() {
+    return myFrameDecorator != null && myFrameDecorator.isInFullScreen();
+  }
+
   public void showWelcomeScreen() {
     myRootPane.showWelcomeScreen();
   }
diff --git a/platform/platform-impl/src/com/intellij/openapi/wm/impl/WindowManagerImpl.java b/platform/platform-impl/src/com/intellij/openapi/wm/impl/WindowManagerImpl.java
index 9473f29fd0ee..20b67771d2ce 100644
--- a/platform/platform-impl/src/com/intellij/openapi/wm/impl/WindowManagerImpl.java
+++ b/platform/platform-impl/src/com/intellij/openapi/wm/impl/WindowManagerImpl.java
@@ -261,7 +261,7 @@ public final class WindowManagerImpl extends WindowManagerEx implements Applicat
 
   @Override
   public boolean isFullScreen(@NotNull Frame frame) {
-    return frame instanceof IdeFrameImpl && ((IdeFrameImpl)frame).getFrameDecorator().isInFullScreen();
+    return frame instanceof IdeFrameImpl && ((IdeFrameImpl)frame).isInFullScreen();
   }
 
   @Override