diff --git a/distro/scripts/adl_cots.sh b/distro/scripts/adl_cots.sh
index c70fe70cb6c69e81a06c5566a4b872933942ac07..c867036d2272d31c2c0a76ca2e0f72dc5c98ffd0 100755
--- a/distro/scripts/adl_cots.sh
+++ b/distro/scripts/adl_cots.sh
@@ -345,6 +345,7 @@ mk_gtest()
 mk_proto()
 {
     echo ${FUNCNAME[0]}
+    PATH=/CSPP_SDR_4_0/JAVA_COTS/jdk1.8.0_73/bin/javac:$PATH
     tar_name=protobuf-3.8.x.zip  && \
     rm -fr ${BUILD}/protobuf*  && \
     rm -fr ${USER_COTS_PATH}//google/protobuf  && \