diff --git a/Run.sh b/Run.sh
index bb4656a..5e91a7d 100644
--- a/Run.sh
+++ b/Run.sh
@@ -1,8 +1,8 @@
 #!/bin/bash
 SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 OUTPUT_DIR="$2"
-CFG_FILE="$3"
 DEFAULT_CFG_FILE=UT2004.ini
+CFG_FILE="{$3:-$DEFAULT_CFG_FILE}"
 function add_iniKeyEx() {
 	crudini --set $OUTPUT_DIR/System/$1 $2 __$3 $4
 	# Warning: ugly hack with sed to allow multiple key instances + to remove space around '='