diff --git a/platform/util/concurrency/com/intellij/util/Timed.java b/platform/util/concurrency/com/intellij/util/Timed.java
index 89bbd43874a0..2ce819ce0a7e 100644
--- a/platform/util/concurrency/com/intellij/util/Timed.java
+++ b/platform/util/concurrency/com/intellij/util/Timed.java
@@ -34,7 +34,7 @@ abstract class Timed<T> implements Disposable {
   public synchronized void dispose() {
     final Object t = myT;
     myT = null;
-    if (t instanceof Disposable) {
+    if (t instanceof Disposable && !Disposer.isDisposed((Disposable) t)) {
       Disposer.dispose((Disposable)t);
     }