diff --git a/source/com/intellij/ide/structureView/newStructureView/StructureTreeBuilder.java b/source/com/intellij/ide/structureView/newStructureView/StructureTreeBuilder.java
index bafc453bd57d..3d81fbce5a60 100644
--- a/source/com/intellij/ide/structureView/newStructureView/StructureTreeBuilder.java
+++ b/source/com/intellij/ide/structureView/newStructureView/StructureTreeBuilder.java
@@ -52,6 +52,7 @@ final class StructureTreeBuilder extends AbstractTreeBuilder {
   }
 
   public void dispose() {
+    myUpdateAlarm.cancelAllRequests();
     PsiManager.getInstance(myProject).removePsiTreeChangeListener(myPsiTreeChangeListener);
     CopyPasteManager.getInstance().removeContentChangedListener(myCopyPasteListener);
     myStructureModel.removeModelListener(myModelListener);