Index: lucene/common-build.xml
===================================================================
--- lucene/common-build.xml	(revision 1389206)
+++ lucene/common-build.xml	(working copy)
@@ -1548,6 +1548,7 @@
           use="true"
           failonerror="true"
           source="${ant.java.version}"
+          locale="en_US"
           windowtitle="${Name} ${version} API"
           doctitle="@{title}"
           maxmemory="${javadoc.maxmemory}">