diff --git a/javadoc/plugin.jelly b/javadoc/plugin.jelly
index b9835b6b..64d18926 100644
--- a/javadoc/plugin.jelly
+++ b/javadoc/plugin.jelly
@@ -26,6 +26,7 @@
   xmlns:artifact="artifact"
   xmlns:javadoc="javadoc"
   xmlns:maven="jelly:maven"
+  xmlns:u="jelly:util"
   >
 
   <!-- ================================================================== -->