diff --git a/platform/lang-api/src/com/intellij/facet/Facet.java b/platform/lang-api/src/com/intellij/facet/Facet.java
index b1a2609cb2cb..8b793e0658a4 100644
--- a/platform/lang-api/src/com/intellij/facet/Facet.java
+++ b/platform/lang-api/src/com/intellij/facet/Facet.java
@@ -19,6 +19,7 @@ package com.intellij.facet;
 import com.intellij.openapi.Disposable;
 import com.intellij.openapi.module.Module;
 import com.intellij.openapi.util.Disposer;
+import com.intellij.openapi.util.ModificationTracker;
 import com.intellij.openapi.util.UserDataHolder;
 import com.intellij.openapi.util.UserDataHolderBase;
 import org.jetbrains.annotations.NotNull;
@@ -30,7 +31,7 @@ import org.jetbrains.annotations.NotNull;
  *
  * @author nik
  */
-public class Facet<C extends FacetConfiguration> extends UserDataHolderBase implements UserDataHolder, Disposable {
+public class Facet<C extends FacetConfiguration> extends UserDataHolderBase implements UserDataHolder, Disposable, ModificationTracker {
   public static final Facet[] EMPTY_ARRAY = new Facet[0];
   @NotNull private final FacetType myFacetType;
   @NotNull private final Module myModule;
@@ -119,4 +120,9 @@ public class Facet<C extends FacetConfiguration> extends UserDataHolderBase impl
   public String toString() {
     return getName() + " (" + getModule().getName() + ")";
   }
+
+  @Override
+  public long getModificationCount() {
+    return isDisposed ? 1 : 0;
+  }
 }