diff --git a/lucene/analysis/kuromoji/build.xml b/lucene/analysis/kuromoji/build.xml
index decfa7a06fc..43ca7e3d790 100644
--- a/lucene/analysis/kuromoji/build.xml
+++ b/lucene/analysis/kuromoji/build.xml
@@ -27,6 +27,7 @@
        is platform dependent?! -->
   <property name="rat.excludes" value="**/*.txt,**/bocchan.utf-8"/>
   <property name="rat.additional-includes" value="src/tools/**"/>
+  <property name="rat.additional-excludes" value="src/tools/patches/**"/>
 
   <!-- we don't want to pull in ipadic/naist etc -->
   <property name="ivy.default.configuration" value="default"/>