diff --git a/branches/1stNUP_for_2ndNUP/documents/Readme.txt b/branches/1stNUP_for_2ndNUP/documents/Readme.txt
index 5095a91..c29cc56 100644
--- a/branches/1stNUP_for_2ndNUP/documents/Readme.txt
+++ b/branches/1stNUP_for_2ndNUP/documents/Readme.txt
@@ -10,7 +10,7 @@ Horizon 2_3 branch r52121 + 
 リリース用ビルドでは開発機・量産機でAES鍵を変えるため、
 
 量産機用ビルドの場合
-./build.sh RELEASE
+./build.sh PROD
 
 でビルドすること。
 
diff --git a/branches/1stNUP_for_2ndNUP/sources/build.sh b/branches/1stNUP_for_2ndNUP/sources/build.sh
index a5b2096..b931659 100755
--- a/branches/1stNUP_for_2ndNUP/sources/build.sh
+++ b/branches/1stNUP_for_2ndNUP/sources/build.sh
@@ -6,7 +6,7 @@
 #
 # 1. common/version.h を変更する
 # 2. 開発実機用ビルドは build.sh UNFIXEDKEY
-#    製品実機用ビルドは build.sh RELEASE
+#    製品実機用ビルドは build.sh PROD
 
 set -u
 set -e
@@ -21,12 +21,12 @@ function getVersion
 }
 
 # フラグ判定
-releaseBuild=false;
+prodBuild=false;
 unfixedKeyBuild=false
 for arg in $@
 do
-    if [ "$arg" = 'RELEASE' ]; then
-	releaseBuild=true
+    if [ "$arg" = 'PROD' ]; then
+	prodBuild=true
     fi
 
     if [ "$arg" = 'UNFIXEDKEY' ]; then
@@ -35,7 +35,7 @@ do
 done
 
 OPTION=""
-if [ $releaseBuild == "true" ] ; then
+if [ $prodBuild == "true" ] ; then
     getVersion
     BUILD_TYPE=release,development
     OPTION="PROD_BUILD=true $VERSION_STR"
@@ -66,7 +66,7 @@ else
 fi
 
 #リリース用ビルドはツールのみ
-if [ $releaseBuild ] || [ $unfixedKeyBuild ] ; then
+if [ $prodBuild ] || [ $unfixedKeyBuild ] ; then
     exit
 fi