diff --git a/jps/antLayout/src/jetbrains/antlayout/datatypes/IdeaModuleBase.java b/jps/antLayout/src/jetbrains/antlayout/datatypes/IdeaModuleBase.java
index ca5becf998cd..e9fed562d308 100644
--- a/jps/antLayout/src/jetbrains/antlayout/datatypes/IdeaModuleBase.java
+++ b/jps/antLayout/src/jetbrains/antlayout/datatypes/IdeaModuleBase.java
@@ -13,6 +13,7 @@ public abstract class IdeaModuleBase extends LayoutFileSet {
   private String name;
 
   protected IdeaModuleBase() {
+    setExcludes("classpath.index");
   }
 
   public IdeaModuleBase(ZipFileSet fileset) {