Index: src/main/java/org/apache/maven/plugin/gpg/GpgSignAttachedMojo.java
===================================================================
--- src/main/java/org/apache/maven/plugin/gpg/GpgSignAttachedMojo.java	(revision 979062)
+++ src/main/java/org/apache/maven/plugin/gpg/GpgSignAttachedMojo.java	(working copy)
@@ -82,6 +82,13 @@
      */
     protected MavenProject project;
 
+     /**
+     * Location of an existing POM file to sign if an other pom file should be signed.  default-value="pom.xml".
+     *
+     * @parameter expression="${pomFile}"
+     */
+    private File pomFile;
+
     /**
      * Maven ProjectHelper
      * 
@@ -170,7 +177,7 @@
 
         try
         {
-            FileUtils.copyFile( project.getFile(), pomToSign );
+            FileUtils.copyFile( pomFile != null ? pomFile : project.getFile(), pomToSign );
         }
         catch ( IOException e )
         {