diff --git a/bin/git-myshellconfig-checkout b/bin/git-myshellconfig-checkout
index d899db7..8b9c202 100755
--- a/bin/git-myshellconfig-checkout
+++ b/bin/git-myshellconfig-checkout
@@ -15,8 +15,8 @@
 MYSHELLCONFIG_LOGDIR="./logs"
 MYSHELLCONFIG_LOGFILE="${MYSHELLCONFIG_LOGDIR}/git.log"
 [ -d "${MYSHELLCONFIG_LOGDIR}" ] || mkdir -p "${MYSHELLCONFIG_LOGDIR}"
-[ -z "${MYSHELLCONFIG_GIT_REMOTE_NAME:+x}" ] || export MYSHELLCONFIG_GIT_REMOTE_NAME=origin
-[ -z "${MYSHELLCONFIG_GIT_BRANCH:+x}" ] || export MYSHELLCONFIG_GIT_BRANCH=master
+[ -z "${MYSHELLCONFIG_GIT_REMOTE_NAME+x}" ] || export MYSHELLCONFIG_GIT_REMOTE_NAME=origin
+[ -z "${MYSHELLCONFIG_GIT_BRANCH+x}" ] || export MYSHELLCONFIG_GIT_BRANCH=master
 
 cat << EOF >> "${MYSHELLCONFIG_LOGFILE}"
 +-----BEGINN $(date) -------------------------------+