diff --git a/xml/impl/src/com/intellij/javaee/ExternalResourcesRootsProvider.java b/xml/impl/src/com/intellij/javaee/ExternalResourcesRootsProvider.java
index 5dc52269d396..f629e3216c03 100644
--- a/xml/impl/src/com/intellij/javaee/ExternalResourcesRootsProvider.java
+++ b/xml/impl/src/com/intellij/javaee/ExternalResourcesRootsProvider.java
@@ -50,7 +50,7 @@ public class ExternalResourcesRootsProvider extends IndexableSetContributor {
           if (dirs.add(dir)) {
             String url = resource.getResourceUrl();
             if (url != null) {
-              set.add(url.substring(0, url.lastIndexOf('/')));
+              set.add(url.substring(0, url.lastIndexOf('/') + 1));
             }
           }
         }