diff --git a/platform/lang-impl/src/com/intellij/psi/codeStyle/DetectAndAdjustIndentOptionsTask.java b/platform/lang-impl/src/com/intellij/psi/codeStyle/DetectAndAdjustIndentOptionsTask.java
index caf200dccf19..1fcb8b621164 100644
--- a/platform/lang-impl/src/com/intellij/psi/codeStyle/DetectAndAdjustIndentOptionsTask.java
+++ b/platform/lang-impl/src/com/intellij/psi/codeStyle/DetectAndAdjustIndentOptionsTask.java
@@ -109,6 +109,8 @@ class DetectAndAdjustIndentOptionsTask extends ReadTask {
   }
 
   public void scheduleInBackgroundForCommittedDocument() {
+    if (myProject.isDisposed()) return;
+    
     if (ApplicationManager.getApplication().isUnitTestMode()) {
       Continuation continuation = performInReadAction(new DumbProgressIndicator());
       if (continuation != null) {