diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/extension/DeweyDecimal.java b/src/main/org/apache/tools/ant/taskdefs/optional/extension/DeweyDecimal.java
index e5963f4b2..7f8bdd945 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/extension/DeweyDecimal.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/extension/DeweyDecimal.java
@@ -27,6 +27,7 @@ package org.apache.tools.ant.taskdefs.optional.extension;
  * must begin with a number.
  *
  * Original Implementation moved to org.apache.tools.ant.util.DeweyDecimal
+ * @deprecated use org.apache.tools.ant.util.DeweyDecimal instead.
  */
 public final class DeweyDecimal extends org.apache.tools.ant.util.DeweyDecimal {
 
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/extension/Extension.java b/src/main/org/apache/tools/ant/taskdefs/optional/extension/Extension.java
index 419c3a599..71de84a70 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/extension/Extension.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/extension/Extension.java
@@ -24,6 +24,7 @@ import java.util.StringTokenizer;
 import java.util.jar.Attributes;
 import java.util.jar.Manifest;
 
+import org.apache.tools.ant.util.DeweyDecimal;
 import org.apache.tools.ant.util.StringUtils;
 
 /**
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/extension/ExtensionAdapter.java b/src/main/org/apache/tools/ant/taskdefs/optional/extension/ExtensionAdapter.java
index c9f548e99..b3cfddc2f 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/extension/ExtensionAdapter.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/extension/ExtensionAdapter.java
@@ -20,6 +20,7 @@ package org.apache.tools.ant.taskdefs.optional.extension;
 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.types.DataType;
 import org.apache.tools.ant.types.Reference;
+import org.apache.tools.ant.util.DeweyDecimal;
 
 /**
  * Simple class that represents an Extension and conforms to Ants
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/extension/Specification.java b/src/main/org/apache/tools/ant/taskdefs/optional/extension/Specification.java
index a4dac26a3..b2755b443 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/extension/Specification.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/extension/Specification.java
@@ -25,6 +25,7 @@ import java.util.Map;
 import java.util.jar.Attributes;
 import java.util.jar.Manifest;
 
+import org.apache.tools.ant.util.DeweyDecimal;
 import org.apache.tools.ant.util.StringUtils;
 
 /**