diff --git a/multichanges/plugin.jelly b/multichanges/plugin.jelly
index e7055cba..b4b17372 100644
--- a/multichanges/plugin.jelly
+++ b/multichanges/plugin.jelly
@@ -19,6 +19,7 @@
  -->
 
 <project
+  xmlns:multiproject="multiproject"
   xmlns:j="jelly:core"
   xmlns:ant="jelly:ant"
   xmlns:define="jelly:define"