diff --git a/platform/lang-impl/src/com/intellij/codeInsight/completion/ComboEditorCompletionContributor.java b/platform/lang-impl/src/com/intellij/codeInsight/completion/ComboEditorCompletionContributor.java
index 0246e779a10a..10994f07e85b 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/completion/ComboEditorCompletionContributor.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/completion/ComboEditorCompletionContributor.java
@@ -18,6 +18,7 @@ package com.intellij.codeInsight.completion;
 import com.intellij.codeInsight.lookup.LookupElement;
 import com.intellij.codeInsight.lookup.LookupElementBuilder;
 import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.project.DumbAware;
 import com.intellij.openapi.util.Key;
 import com.intellij.psi.PsiDocumentManager;
 import com.intellij.psi.PsiFile;
@@ -29,7 +30,7 @@ import javax.swing.*;
 /**
  * @author peter
  */
-public class ComboEditorCompletionContributor extends CompletionContributor{
+public class ComboEditorCompletionContributor extends CompletionContributor implements DumbAware {
 
   public static final Key<Boolean> CONTINUE_RUN_COMPLETION = Key.create("CONTINUE_RUN_COMPLETION");