diff --git a/src/main/org/apache/tools/ant/types/XMLCatalog.java b/src/main/org/apache/tools/ant/types/XMLCatalog.java
index 23286f174..4152400bc 100644
--- a/src/main/org/apache/tools/ant/types/XMLCatalog.java
+++ b/src/main/org/apache/tools/ant/types/XMLCatalog.java
@@ -168,7 +168,7 @@ public class XMLCatalog extends DataType implements Cloneable, EntityResolver {
         Vector ourElements = getElements();
         Enumeration enum = newElements.elements();
         while (enum.hasMoreElements()) {
-            ourElements.add(enum.nextElement());
+            ourElements.addElement(enum.nextElement());
         }
     }