diff --git a/build.xml b/build.xml
index 09b5dfe..8d6e041 100644
--- a/build.xml
+++ b/build.xml
@@ -13,6 +13,11 @@
 	<property name="base.dir" value="${htmldir}" />
 
 	<target name="merge">
+		<!-- XInclude support comes with Eclipse XML Tools Project,
+			the Ant target needs to be executed in the Eclispe Workspace JRE
+			in order to get found. Any custom project specific runtime
+			may not work.
+		-->
 		<xsl.xinclude in="${docbooksource}/BruteXServices_User_Guide.xml" out="${docbooksource}/BruteXServices_User_Guide.dbk" />
 	</target>