diff --git a/WHATSNEW b/WHATSNEW
index 35787f176..bae8309c2 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -258,6 +258,9 @@ Fixed bugs:
 * Copy of UnknownElement in macroinstance was not recursive.
   Bugzilla report 40238.
 
+* mixing of add and addConfigured methods in Mapper/ChainedMapper
+  causes incorrect chaining. Bugzilla report 40228.
+
 Other changes:
 --------------
 
diff --git a/src/etc/testcases/types/addtype.xml b/src/etc/testcases/types/addtype.xml
index fb9340d37..bdc0bed71 100644
--- a/src/etc/testcases/types/addtype.xml
+++ b/src/etc/testcases/types/addtype.xml
@@ -67,6 +67,9 @@
     <typedef loaderref="nested.loader"
              name = "myaddconfigured" 
              classname="${nested.package}AddTypeTest$MyAddConfigured"/>
+    <typedef loaderref="nested.loader"
+             name = "myaddconfiguredvalue" 
+             classname="${nested.package}AddTypeTest$MyAddConfiguredValue"/>
     <typedef loaderref="nested.loader"
              name = "myvalue" 
              classname="${nested.package}AddTypeTest$MyValue"/>
@@ -127,6 +130,12 @@
     </myaddconfigured>
   </target>
 
+  <target name="myaddconfiguredvalue" depends="init">
+    <myaddconfiguredvalue>
+      <value>Value Set</value>
+    </myaddconfiguredvalue>
+  </target>
+
   <target name="namespacetest" xmlns:prefix="uri">
     <typedef name="eq" uri="uri"
              classname="org.apache.tools.ant.taskdefs.condition.Equals"/>
diff --git a/src/main/org/apache/tools/ant/IntrospectionHelper.java b/src/main/org/apache/tools/ant/IntrospectionHelper.java
index 24ca3ee34..c45a175bd 100644
--- a/src/main/org/apache/tools/ant/IntrospectionHelper.java
+++ b/src/main/org/apache/tools/ant/IntrospectionHelper.java
@@ -267,7 +267,16 @@ public final class IntrospectionHelper implements BuildListener {
                         constructor =
                             args[0].getConstructor(new Class[] {Project.class});
                     }
+
                     String propName = getPropertyName(name, "add");
+                    if (nestedTypes.get(propName) != null) {
+                        /*
+                         *  Ignore this method as there is an addConfigured
+                         *  form of this method that has a higher
+                         *  priority
+                         */
+                        continue;
+                    }
                     nestedTypes.put(propName, args[0]);
                     nestedCreators.put(propName, new AddNestedCreator(m,
                         constructor, AddNestedCreator.ADD));
@@ -1439,6 +1448,8 @@ public final class IntrospectionHelper implements BuildListener {
      * the addTypeMethods array. The array is
      * ordered so that the more derived classes
      * are first.
+     * If both add and addConfigured are present, the addConfigured
+     * will take priority.
      * @param method the <code>Method</code> to insert.
      */
     private void insertAddTypeMethod(Method method) {
@@ -1446,6 +1457,10 @@ public final class IntrospectionHelper implements BuildListener {
         for (int c = 0; c < addTypeMethods.size(); ++c) {
             Method current = (Method) addTypeMethods.get(c);
             if (current.getParameterTypes()[0].equals(argClass)) {
+                if (method.getName().equals("addConfigured")) {
+                    // add configured replaces the add method
+                    addTypeMethods.set(c, method);
+                }
                 return; // Already present
             }
             if (current.getParameterTypes()[0].isAssignableFrom(
diff --git a/src/main/org/apache/tools/ant/types/Mapper.java b/src/main/org/apache/tools/ant/types/Mapper.java
index 5e6a00faa..903bfd1be 100644
--- a/src/main/org/apache/tools/ant/types/Mapper.java
+++ b/src/main/org/apache/tools/ant/types/Mapper.java
@@ -57,6 +57,15 @@ public class Mapper extends DataType implements Cloneable {
         this.type = type;
     }
 
+    /**
+     * Cannot mix add and addconfigured in same type, so
+     * provide this to override the add method.
+     * @param fileNameMapper   the <code>FileNameMapper</code> to add.
+     */
+    public void addConfigured(FileNameMapper fileNameMapper) {
+        add(fileNameMapper);
+    }
+
     /**
      * Add a nested <code>FileNameMapper</code>.
      * @param fileNameMapper   the <code>FileNameMapper</code> to add.
diff --git a/src/main/org/apache/tools/ant/util/ContainerMapper.java b/src/main/org/apache/tools/ant/util/ContainerMapper.java
index aa8d107b1..4b62b9be1 100755
--- a/src/main/org/apache/tools/ant/util/ContainerMapper.java
+++ b/src/main/org/apache/tools/ant/util/ContainerMapper.java
@@ -40,6 +40,19 @@ public abstract class ContainerMapper implements FileNameMapper {
         add(mapper.getImplementation());
     }
 
+    /**
+     * An add configured version of the add method.
+     * This class used to contain an add method and an
+     * addConfiguredMapper method. Dur to ordering,
+     * the add method was always called first. This
+     * addConfigued method has been added to allow
+     * chaining to work correctly.
+     * @param fileNameMapper a <code>FileNameMapper</code>.
+     */
+    public void addConfigured(FileNameMapper fileNameMapper) {
+        add(fileNameMapper);
+    }
+
     /**
      * Add a <code>FileNameMapper</code>.
      * @param fileNameMapper a <code>FileNameMapper</code>.
diff --git a/src/testcases/org/apache/tools/ant/types/AddTypeTest.java b/src/testcases/org/apache/tools/ant/types/AddTypeTest.java
index 7df3f6ec8..15a9a85c8 100644
--- a/src/testcases/org/apache/tools/ant/types/AddTypeTest.java
+++ b/src/testcases/org/apache/tools/ant/types/AddTypeTest.java
@@ -18,6 +18,7 @@
 package org.apache.tools.ant.types;
 
 import org.apache.tools.ant.BuildFileTest;
+import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.Project;
 import org.apache.tools.ant.Task;
 import org.apache.tools.ant.taskdefs.condition.Condition;
@@ -86,6 +87,12 @@ public class AddTypeTest extends BuildFileTest {
             "myaddconfigured", "value is Value Setexecute: value is Value Set");
     }
 
+    public void testAddConfiguredValue() {
+        expectLogContaining(
+            "myaddconfiguredvalue",
+            "value is Value Setexecute: value is Value Set");
+    }
+
     public void testNamespace() {
         executeTarget("namespacetest");
     }
@@ -151,6 +158,25 @@ public class AddTypeTest extends BuildFileTest {
             log("value is " + value);
             this.value = value;
         }
+        public void add(MyValue value) {
+            throw new BuildException("Should not be called");
+        }
+        public void execute() {
+            log("execute: value is " + value);
+        }
+    }
+
+    public static class MyAddConfiguredValue
+        extends Task
+    {
+        MyValue value;
+        public void addConfiguredValue(MyValue value) {
+            log("value is " + value);
+            this.value = value;
+        }
+        public void addValue(MyValue value) {
+            throw new BuildException("Should not be called");
+        }
         public void execute() {
             log("execute: value is " + value);
         }