diff --git a/optimize_mysql_tables.sh b/optimize_mysql_tables.sh
index b143dbd..42b006a 100755
--- a/optimize_mysql_tables.sh
+++ b/optimize_mysql_tables.sh
@@ -241,7 +241,7 @@ fi
 
 if [[ ${#mysql_credential_args_arr[@]} -eq 0 ]]; then
    [[ -z "$mysql_credential_args" ]] && mysql_credential_args="$DEFAULT_MYSQL_CREDENTIAL_ARGS"
-   mysql_credential_args_arr="default:$mysql_credential_args"
+   mysql_credential_args_arr="$mysql_credential_args"
 fi
 
 declare -i length_table_name