diff --git a/src/main/org/apache/tools/ant/taskdefs/Copy.java b/src/main/org/apache/tools/ant/taskdefs/Copy.java
index 47efb956d..15df9f02d 100644
--- a/src/main/org/apache/tools/ant/taskdefs/Copy.java
+++ b/src/main/org/apache/tools/ant/taskdefs/Copy.java
@@ -318,6 +318,9 @@ public class Copy extends Task {
         if (destFile != null) {
             destDir = null;
         }
+        fileCopyMap.clear();
+        dirCopyMap.clear();
+        completeDirMap.clear();
     }
 
 //************************************************************************