diff --git a/java/openapi/src/com/intellij/psi/search/PackageScope.java b/java/openapi/src/com/intellij/psi/search/PackageScope.java
index d2c7a292d224..dcfe5eea194c 100644
--- a/java/openapi/src/com/intellij/psi/search/PackageScope.java
+++ b/java/openapi/src/com/intellij/psi/search/PackageScope.java
@@ -23,7 +23,7 @@ import com.intellij.openapi.module.Module;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.roots.PackageIndex;
 import com.intellij.openapi.util.Comparing;
-import com.intellij.openapi.vfs.VfsUtil;
+import com.intellij.openapi.vfs.VfsUtilCore;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiPackage;
 import org.jetbrains.annotations.NotNull;
@@ -49,7 +49,7 @@ public class PackageScope extends GlobalSearchScope {
   public boolean contains(VirtualFile file) {
     for (VirtualFile scopeDir : myDirs) {
       boolean inDir = myIncludeSubpackages
-                      ? VfsUtil.isAncestor(scopeDir, file, false)
+                      ? VfsUtilCore.isAncestor(scopeDir, file, false)
                       : Comparing.equal(file.getParent(), scopeDir);
       if (inDir) return true;
     }
diff --git a/platform/core-api/src/com/intellij/openapi/vfs/VfsUtilCore.java b/platform/core-api/src/com/intellij/openapi/vfs/VfsUtilCore.java
new file mode 100644
index 000000000000..914cf9a2998b
--- /dev/null
+++ b/platform/core-api/src/com/intellij/openapi/vfs/VfsUtilCore.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2000-2011 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.openapi.vfs;
+
+import org.jetbrains.annotations.NotNull;
+
+public class VfsUtilCore {
+  /**
+   * Checks whether the <code>ancestor {@link com.intellij.openapi.vfs.VirtualFile}</code> is parent of <code>file
+   * {@link com.intellij.openapi.vfs.VirtualFile}</code>.
+   *
+   * @param ancestor the file
+   * @param file     the file
+   * @param strict   if <code>false</code> then this method returns <code>true</code> if <code>ancestor</code>
+   *                 and <code>file</code> are equal
+   * @return <code>true</code> if <code>ancestor</code> is parent of <code>file</code>; <code>false</code> otherwise
+   */
+  public static boolean isAncestor(@NotNull VirtualFile ancestor, @NotNull VirtualFile file, boolean strict) {
+    if (!file.getFileSystem().equals(ancestor.getFileSystem())) return false;
+    VirtualFile parent = strict ? file.getParent() : file;
+    while (true) {
+      if (parent == null) return false;
+      if (parent.equals(ancestor)) return true;
+      parent = parent.getParent();
+    }
+  }
+}
diff --git a/platform/platform-api/src/com/intellij/openapi/vfs/VfsUtil.java b/platform/platform-api/src/com/intellij/openapi/vfs/VfsUtil.java
index d1ff5d7f8393..15f10cb78acb 100644
--- a/platform/platform-api/src/com/intellij/openapi/vfs/VfsUtil.java
+++ b/platform/platform-api/src/com/intellij/openapi/vfs/VfsUtil.java
@@ -42,7 +42,7 @@ import java.net.URL;
 import java.nio.charset.Charset;
 import java.util.*;
 
-public class VfsUtil {
+public class VfsUtil extends VfsUtilCore {
   private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.vfs.VfsUtil");
 
   public static String loadText(@NotNull VirtualFile file) throws IOException{
@@ -60,26 +60,6 @@ public class VfsUtil {
     file.setBinaryContent(text.getBytes(charset.name()));
   }
 
-  /**
-   * Checks whether the <code>ancestor {@link VirtualFile}</code> is parent of <code>file
-   * {@link VirtualFile}</code>.
-   *
-   * @param ancestor the file
-   * @param file     the file
-   * @param strict   if <code>false</code> then this method returns <code>true</code> if <code>ancestor</code>
-   *                 and <code>file</code> are equal
-   * @return <code>true</code> if <code>ancestor</code> is parent of <code>file</code>; <code>false</code> otherwise
-   */
-  public static boolean isAncestor(@NotNull VirtualFile ancestor, @NotNull VirtualFile file, boolean strict) {
-    if (!file.getFileSystem().equals(ancestor.getFileSystem())) return false;
-    VirtualFile parent = strict ? file.getParent() : file;
-    while (true) {
-      if (parent == null) return false;
-      if (parent.equals(ancestor)) return true;
-      parent = parent.getParent();
-    }
-  }
-
   /**
    * Gets the relative path of <code>file</code> to its <code>ancestor</code>. Uses <code>separator</code> for
    * separating files.