Index: src/main/java/org/codehaus/mojo/retrotranslator/RetrotranslateMojo.java
===================================================================
--- src/main/java/org/codehaus/mojo/retrotranslator/RetrotranslateMojo.java	(revision 2136)
+++ src/main/java/org/codehaus/mojo/retrotranslator/RetrotranslateMojo.java	(working copy)
@@ -48,7 +48,7 @@
      * @readonly
      */
     private List classpathElements;
-    
+
     /**
      * The classpath to use for verification including rt.jar, jce.jar, jsse.jar 
      * (from JRE 1.4).  The retrotranslator-runtime-n.n.n.jar, and backport-util-concurrent.jar
@@ -57,25 +57,25 @@
      * @parameter
      */
     private List verifyClasspath;
-    
+
     /**
      * Directory to place classes compatible with J2SE 1.4.
      * 
-     * @parameter
+     * @parameter expression="${maven.retrotrans.destdir}"
      */
     private File destdir;
 
     /**
      * JAR file to place classes compatible with J2SE 1.4.
      * 
-     * @parameter
+     * @parameter expression="${maven.retrotrans.destjar}"
      */
     private File destjar;
 
     /**
      * Asks the translator to strip signature (generics) information.
      * 
-     * @parameter default-value="false"
+     * @parameter default-value="false" expression="${maven.retrotrans.stripsign}"
      * @required
      */
     private boolean stripsign;
@@ -83,16 +83,15 @@
     /**
      * Asks the translator for verbose output.
      * 
-     * @parameter default-value="false"
+     * @parameter expression="${maven.retrotrans.verbose}"
      * @required
      */
     private boolean verbose;
 
     /**
-     * Asks the translator for warnings when references to unknown classes, 
-     * methods, or fields are found.
+     * Asks the translator for warnings when references to unknown classes, methods, or fields are found.
      * 
-     * @parameter default-value="false"
+     * @parameter default-value="false" expression="${maven.retrotrans.verify}"
      * @required
      */
     private boolean verify;
@@ -100,7 +99,7 @@
     /**
      * Asks the translator to transform only Java 5.0 classes.
      * 
-     * @parameter default-value="false"
+     * @parameter default-value="false" expression="${maven.retrotrans.lazy}"
      * @required
      */
     private boolean lazy;
@@ -108,7 +107,7 @@
     /**
      * Fails build when verification has failed.
      * 
-     * @parameter default-value="true"
+     * @parameter default-value="true" expression="${maven.retrotrans.failonwarning}"
      * @required
      */
     private boolean failonwarning;