diff --git a/ant/plugin.jelly b/ant/plugin.jelly
index 75aaf81e..8bc7a640 100644
--- a/ant/plugin.jelly
+++ b/ant/plugin.jelly
@@ -22,7 +22,9 @@
   xmlns:ant="jelly:ant"
   xmlns:maven="jelly:maven"
   xmlns:test="test"
-  xmlns:j="jelly:core">
+  xmlns:j="jelly:core"
+  xmlns:i="jelly:interaction"
+  xmlns:u="jelly:util">
   <!-- ================================================================== -->
   <!-- A N T  B U I L D  G E N E R A T O R                                -->
   <!-- ================================================================== -->
@@ -37,21 +39,52 @@
            description="Generate an Ant build file"
            prereqs="ant:generate-build"/>
 
-  <goal
-    name="ant:generate-build"
-    description="Generate an Ant build file">
-    <j:if test="${context.getVariable('maven.ant.generatebuild.file') != null and !context.getVariable('maven.ant.generatebuild.file').equals('')}">
-      <ant:echo>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!</ant:echo>
-      <ant:echo>The property "maven.ant.generatebuild.file" is no more used.</ant:echo>
-      <ant:echo>Use the properties "maven.ant.generate.dir" and "maven.ant.generate.script" instead</ant:echo>
-      <ant:echo>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!</ant:echo>
+  <goal name="ant:generate-build"
+           description="Generate an Ant build file"
+           prereqs="ant:verify-script-exists,ant:generate-script"/>
+
+  <goal name="ant:verify-script-exists" description="Check if the script already exists.">
+    <u:file var="projectAsFile" name="${maven.ant.generate.dir}/${maven.ant.generate.script}"/>
+    <j:if test="${(projectAsFile.exists())}">
+      <ant:echo>The ant script [${maven.ant.generate.dir}/${maven.ant.generate.script}] already exists !!</ant:echo>
+      <j:choose>
+        <j:when test="${(maven.ant.generate.force == null) or not (maven.ant.generate.force == 'true')}">
+          <i:ask question="Would you like to override your current script (y/n)?" answer="ok" default="y"/>
+          <j:choose>
+            <j:when test="${ok == 'y'}">
+              <ant:echo>!! Your script will be replaced replaced !!</ant:echo>
+            </j:when>
+            <j:otherwise>
+              <ant:echo>Script generation aborted.</ant:echo>
+              <j:set var="abortProcess" value="true"/>
+            </j:otherwise>        
+          </j:choose>
+        </j:when>      
+        <j:otherwise>
+          <ant:echo>The property "maven.ant.generate.force" is setted to [${maven.ant.generate.force}].</ant:echo>
+          <ant:echo>!! Your current script will be replaced !!</ant:echo>
+        </j:otherwise>
+      </j:choose>
+    </j:if>
+  </goal>
+
+  <goal
+    name="ant:generate-script"
+    description="Generate an Ant build file">
+    <j:if test="${context.getVariable('abortProcess') == null or context.getVariable('abortProcess') != true}">
+      <j:if test="${context.getVariable('maven.ant.generatebuild.file') != null and !context.getVariable('maven.ant.generatebuild.file').equals('')}">
+        <ant:echo>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!</ant:echo>
+        <ant:echo>The property "maven.ant.generatebuild.file" is no more used.</ant:echo>
+        <ant:echo>Use the properties "maven.ant.generate.dir" and "maven.ant.generate.script" instead</ant:echo>
+        <ant:echo>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!</ant:echo>
+      </j:if>
+      <ant:echo>Generating ${maven.ant.generate.dir}/${maven.ant.generate.script} ...</ant:echo>
+      <ant:mkdir dir="${maven.ant.generate.dir}"/>
+      <j:file name="${maven.ant.generate.dir}/${maven.ant.generate.script}" prettyPrint="true">
+        <j:import file="${plugin.resources}/templates/build.jelly" inherit="true"/>
+      </j:file>
+      <ant:echo>${maven.ant.generate.dir}/${maven.ant.generate.script} generated.</ant:echo>
     </j:if>
-    <ant:echo>Generating ${maven.ant.generate.dir}/${maven.ant.generate.script} ...</ant:echo>
-    <ant:mkdir dir="${maven.ant.generate.dir}"/>
-    <j:file name="${maven.ant.generate.dir}/${maven.ant.generate.script}" prettyPrint="true">
-      <j:import file="${plugin.resources}/templates/build.jelly" inherit="true"/>
-    </j:file>
-    <ant:echo>${maven.ant.generate.dir}/${maven.ant.generate.script} generated.</ant:echo>
   </goal>
   
   <goal
diff --git a/ant/plugin.properties b/ant/plugin.properties
index c6d96f7b..a9537f5b 100644
--- a/ant/plugin.properties
+++ b/ant/plugin.properties
@@ -23,6 +23,7 @@
 
 maven.ant.generate.script = build.xml
 maven.ant.generate.dir    = ${basedir}
+maven.ant.generate.force  = false
 
 maven.ant.execute.script = ${maven.ant.generate.script}
 maven.ant.execute.dir    = ${maven.ant.generate.dir}
diff --git a/ant/project.xml b/ant/project.xml
index 6476a7ae..4952b1c5 100644
--- a/ant/project.xml
+++ b/ant/project.xml
@@ -90,6 +90,11 @@
         <comment>This library is already loaded by maven's core. Be careful to use the same version number as in the core.</comment>
       </properties>
     </dependency>
+    <dependency>
+      <groupId>commons-jelly</groupId>
+      <artifactId>commons-jelly-tags-interaction</artifactId>
+      <version>1.0</version>
+    </dependency>
   </dependencies>
  <reports>
     <report>maven-changes-plugin</report>
diff --git a/ant/xdocs/changes.xml b/ant/xdocs/changes.xml
index 9ad9afdb..801f4bfb 100644
--- a/ant/xdocs/changes.xml
+++ b/ant/xdocs/changes.xml
@@ -26,6 +26,7 @@
   </properties>
   <body>
     <release version="1.10-SNAPSHOT" date="In SVN">
+      <action dev="aheritier" type="add" issue="MPANT-19">The plugin overwrote existing ant script files without warning. From now the plugin ask you if you want to replace it. You can also use the property maven.ant.generate.force to force the plugin to replace the current script.</action>
       <action dev="aheritier" type="update">The property maven.ant.generatebuild.file is replaced by properties maven.ant.generate.dir, maven.ant.generate.script. The generated script is ${maven.ant.generate.dir}/${maven.ant.generate.script}.</action>
       <action dev="aheritier" type="del">The property maven.ant.generatebuild.file is removed.</action>
       <action dev="aheritier" type="add" issue="MPANT-25">Add a new goal (ant:execute) to execute a build.xml file from maven.</action>
diff --git a/ant/xdocs/properties.xml b/ant/xdocs/properties.xml
index 70464625..079bbcf9 100644
--- a/ant/xdocs/properties.xml
+++ b/ant/xdocs/properties.xml
@@ -47,6 +47,13 @@
           <td>Yes</td>
           <td>${basedir}</td>
         </tr>
+        <tr>
+          <td>maven.ant.generate.force</td>
+          <td>If the ant script file already exists the plugin ask you if you want to replace it. Setting this property to true, will force the plugin to overwrite this file without to ask the question.</td>
+          <td>since 1.10</td>
+          <td>Yes</td>
+          <td>false</td>
+        </tr>
         <tr>
           <td>maven.ant.excludeTests</td>
           <td>Holds a comma separated list of source file patterns that will be excluded in the generated Ant build, e.g.</td>