diff --git a/src/main/org/apache/tools/ant/types/XMLCatalog.java b/src/main/org/apache/tools/ant/types/XMLCatalog.java
index 509bdd012..671d049d5 100644
--- a/src/main/org/apache/tools/ant/types/XMLCatalog.java
+++ b/src/main/org/apache/tools/ant/types/XMLCatalog.java
@@ -670,7 +670,7 @@ public class XMLCatalog extends DataType
             }
         }
 
-        if (url != null) {
+        if (url != null && url.getProtocol().equals("file")) {
             String fileName = FILE_UTILS.fromURI(url.toString());
             if (fileName != null) {
                 log("fileName " + fileName, Project.MSG_DEBUG);