diff --git a/install_mysql.sh b/install_mysql.sh
index 5c95c02..99a0086 100755
--- a/install_mysql.sh
+++ b/install_mysql.sh
@@ -4849,8 +4849,8 @@ EOF
       echo "## -" >> ${logdir}/main.log
 
       if grep -q -E "^\s*EnvironmentFile\s*=" /etc/systemd/system/$MYSQL_SERVICE_FILE ; then
-         echo "perl -i -n -p -e \"s/^(\s*EnvironmentFile\s*=.*)/#\1\nEnvironmentFile=-${SYSTEMD_ENV_FILE}\" /etc/systemd/system/$MYSQL_SERVICE_FILE" >> ${logdir}/main.log
-         perl -i -n -p -e "s/^(\s*EnvironmentFile\s*=.*)/#\1\nEnvironmentFile=-${SYSTEMD_ENV_FILE}/" \
+         echo "perl -i -n -p -e \"s#^(\s*EnvironmentFile\s*=.*)#\#\1\nEnvironmentFile=-${SYSTEMD_ENV_FILE}#\" /etc/systemd/system/$MYSQL_SERVICE_FILE" >> ${logdir}/main.log
+         perl -i -n -p -e "s#^(\s*EnvironmentFile\s*=.*)#\#\1\nEnvironmentFile=-${SYSTEMD_ENV_FILE}#" \
             /etc/systemd/system/$MYSQL_SERVICE_FILE >> ${logdir}/main.log 2>&1
          _retval=$?
       else