diff --git a/openapi/src/com/intellij/openapi/wm/ToolWindowId.java b/openapi/src/com/intellij/openapi/wm/ToolWindowId.java
index 842e12e9fbb6..d90f143e38c7 100644
--- a/openapi/src/com/intellij/openapi/wm/ToolWindowId.java
+++ b/openapi/src/com/intellij/openapi/wm/ToolWindowId.java
@@ -34,4 +34,5 @@ public interface ToolWindowId {
   String DEPENDENCIES = UIBundle.message("tool.window.name.dependency.viewer");
   String VCS = UIBundle.message("tool.window.name.version.control");
   String MODULES_DEPENDENCIES = UIBundle.message("tool.window.name.module.dependencies");
+  String DUPLICATES = UIBundle.message("tool.window.name.module.duplicates");
 }
\ No newline at end of file
diff --git a/resources_eng/src/messages/UIBundle.properties b/resources_eng/src/messages/UIBundle.properties
index ca1907eed375..c95b1e2ea2f6 100644
--- a/resources_eng/src/messages/UIBundle.properties
+++ b/resources_eng/src/messages/UIBundle.properties
@@ -154,4 +154,5 @@ class.filter.editor.add.dialog.title=New Filter
 label.class.filter.editor.add.dialog.filter.pattern=Enter the filter pattern:
 
 choose.class=Choose class
-big.text.control.window.title=Text
\ No newline at end of file
+big.text.control.window.title=Text
+tool.window.name.module.duplicates=Duplicates
\ No newline at end of file