diff --git a/src/main/java/com/jayway/maven/plugins/android/AbstractAndroidMojo.java b/src/main/java/com/jayway/maven/plugins/android/AbstractAndroidMojo.java
index <HASH>..<HASH> 100644
--- a/src/main/java/com/jayway/maven/plugins/android/AbstractAndroidMojo.java
+++ b/src/main/java/com/jayway/maven/plugins/android/AbstractAndroidMojo.java
@@ -211,7 +211,7 @@ public abstract class AbstractAndroidMojo extends AbstractMojo {
     /**
      * Generates R.java into a different package.
      *
-     * @parameter
+     * @parameter expression="${android.customPackage}"
      */
     protected String customPackage;
Allow setting -Dandroid.customPackage from command line.