diff --git a/platform/diff-impl/src/com/intellij/diff/tools/util/base/DiffViewerBase.java b/platform/diff-impl/src/com/intellij/diff/tools/util/base/DiffViewerBase.java
index 8e03481e1c7a..cb611e72397e 100644
--- a/platform/diff-impl/src/com/intellij/diff/tools/util/base/DiffViewerBase.java
+++ b/platform/diff-impl/src/com/intellij/diff/tools/util/base/DiffViewerBase.java
@@ -147,6 +147,10 @@ public abstract class DiffViewerBase implements DiffViewer, DataProvider {
     return myRequest;
   }
 
+  public boolean isDisposed() {
+    return myDisposed.get();
+  }
+
   //
   // Abstract
   //