diff --git a/xdoc/project.properties b/xdoc/project.properties
index 578b991f..e6baacbc 100644
--- a/xdoc/project.properties
+++ b/xdoc/project.properties
@@ -19,3 +19,4 @@
 # -------------------------------------------------------------------
 maven.junit.fork=yes
 maven.compile.encoding=UTF-8
+maven.xdoc.validate.exclude=changes.xml,reference/escapeXml.xml