diff --git a/src/main/org/apache/tools/ant/types/AntFilterReader.java b/src/main/org/apache/tools/ant/types/AntFilterReader.java
index 20c41bc70..bdc1c316f 100644
--- a/src/main/org/apache/tools/ant/types/AntFilterReader.java
+++ b/src/main/org/apache/tools/ant/types/AntFilterReader.java
@@ -27,8 +27,7 @@ import org.apache.tools.ant.Project;
  * An AntFilterReader is a wrapper class that encloses the classname
  * and configuration of a Configurable FilterReader.
  */
-public final class AntFilterReader
-    extends DataType implements Cloneable {
+public final class AntFilterReader extends DataType {
 
     private String className;
 
diff --git a/src/main/org/apache/tools/ant/types/FilterChain.java b/src/main/org/apache/tools/ant/types/FilterChain.java
index b495a5a32..da7d96716 100644
--- a/src/main/org/apache/tools/ant/types/FilterChain.java
+++ b/src/main/org/apache/tools/ant/types/FilterChain.java
@@ -45,8 +45,7 @@ import org.apache.tools.ant.filters.TokenFilter;
  * FilterChain may contain a chained set of filter readers.
  *
  */
-public class FilterChain extends DataType
-    implements Cloneable {
+public class FilterChain extends DataType {
 
     private Vector<Object> filterReaders = new Vector<Object>();
 
diff --git a/src/main/org/apache/tools/ant/types/Mapper.java b/src/main/org/apache/tools/ant/types/Mapper.java
index 941e8dd8c..c02e78207 100644
--- a/src/main/org/apache/tools/ant/types/Mapper.java
+++ b/src/main/org/apache/tools/ant/types/Mapper.java
@@ -30,7 +30,7 @@ import org.apache.tools.ant.util.FileNameMapper;
  * Element to define a FileNameMapper.
  *
  */
-public class Mapper extends DataType implements Cloneable {
+public class Mapper extends DataType {
     // CheckStyle:VisibilityModifier OFF - bc
 
     protected MapperType type = null;
diff --git a/src/main/org/apache/tools/ant/types/XMLCatalog.java b/src/main/org/apache/tools/ant/types/XMLCatalog.java
index bd9be4312..2edd5a136 100644
--- a/src/main/org/apache/tools/ant/types/XMLCatalog.java
+++ b/src/main/org/apache/tools/ant/types/XMLCatalog.java
@@ -119,7 +119,7 @@ import org.xml.sax.XMLReader;
  *
  */
 public class XMLCatalog extends DataType
-    implements Cloneable, EntityResolver, URIResolver {
+    implements EntityResolver, URIResolver {
 
     /** helper for some File.toURL connversions */
     private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();