diff --git a/platform/lang-impl/src/com/intellij/codeInsight/documentation/DocumentationManager.java b/platform/lang-impl/src/com/intellij/codeInsight/documentation/DocumentationManager.java
index 9cd4000274db..23915b48aedc 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/documentation/DocumentationManager.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/documentation/DocumentationManager.java
@@ -718,6 +718,7 @@ public class DocumentationManager {
 
     myUpdateDocAlarm.addRequest(new Runnable() {
       public void run() {
+        if (myProject.isDisposed()) return;
         final Throwable[] ex = new Throwable[1];
         String text = null;
         try {