diff --git a/core/src/main/java/hudson/tasks/junit/XMLEntityResolver.java b/core/src/main/java/hudson/tasks/junit/XMLEntityResolver.java
index d3af4d01f3..d2e2a7a622 100644
--- a/core/src/main/java/hudson/tasks/junit/XMLEntityResolver.java
+++ b/core/src/main/java/hudson/tasks/junit/XMLEntityResolver.java
@@ -37,7 +37,7 @@ class XMLEntityResolver implements EntityResolver {
 				LOGGER.fine( "It's a TestNG document, will try to lookup DTD in classpath" );
 				String dtdFileName = systemId.substring( TESTNG_NAMESPACE.length() );
 
-                URL url = Hudson.getInstance().servletContext.getResource(dtdFileName);
+                URL url = Hudson.getInstance().servletContext.getResource('/'+dtdFileName);
                 if(url!=null)
                     return new InputSource(url.toString());
             }