diff --git a/java/kotlin/generate-sources-build.xml b/java/kotlin/generate-sources-build.xml
index b78bc0ba7a..6963f3717f 100644
--- a/java/kotlin/generate-sources-build.xml
+++ b/java/kotlin/generate-sources-build.xml
@@ -3,7 +3,6 @@
     <mkdir dir="${generated.sources.dir}"/>
     <exec executable="${protoc}">
         <arg value="--kotlin_out=${generated.sources.dir}"/>
-        <arg value="--java_out=${generated.sources.dir}"/>
         <arg value="--proto_path=${protobuf.source.dir}"/>
         <arg value="${protobuf.source.dir}/google/protobuf/any.proto"/>
         <arg value="${protobuf.source.dir}/google/protobuf/api.proto"/>