diff --git a/src/main/org/apache/tools/ant/taskdefs/Zip.java b/src/main/org/apache/tools/ant/taskdefs/Zip.java
index 9c54ab8a3..e411cf8f4 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Zip.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Zip.java
@@ -844,11 +844,11 @@ public class Zip extends MatchingTask {
             Vector resources = new Vector();
             String[] directories = rs.getIncludedDirectories();
             for (int j = 0; j < directories.length; j++) {
-                resources.add(rs.getResource(directories[j]));
+                resources.addElement(rs.getResource(directories[j]));
             }
             String[] files = rs.getIncludedFiles();
             for (int j = 0; j < files.length; j++) {
-                resources.add(rs.getResource(files[j]));
+                resources.addElement(rs.getResource(files[j]));
             }
             
             result[i] = new Resource[resources.size()];