diff --git a/misc/importdb.sh b/misc/importdb.sh
index 652aaac2..9a3d7dfa 100644
--- a/misc/importdb.sh
+++ b/misc/importdb.sh
@@ -11,7 +11,7 @@ InstallSQLDir=/usr/local/omc/etc/db/install
 drop_db_sql="drop database IF EXISTS ${DBNAME}"
 create_db_sql="create database IF NOT EXISTS ${DBNAME}"
 
-case "$M_ARG" in
+case "$1" in
         upgrade)
 			echo "Upgrade database ${DBNAME}"
 			for SQL in ${UpgradeSQLDir}/*.sql; do