diff --git a/modserver/update_mods.sh b/modserver/update_mods.sh
index 6b19926..8ea8f59 100644
--- a/modserver/update_mods.sh
+++ b/modserver/update_mods.sh
@@ -17,12 +17,18 @@ else
 fi
 
 # ===================================================
-# 02. Local script variables
+# 02. Local script variables and checks
 # ===================================================
+export STEAMCMD_USER=steam
 export LOCAL_STOCK_GAME="$HOME/stock/DayZ"
 export LOCAL_STOCK_SERVER="$HOME/stock/DayZServer"
 mkdir -p "$LOCAL_STOCK_GAME" "$LOCAL_STOCK_SERVER"
 
+if [ "$USER" != "$STEAMCMD_USER" ] ; then
+	errmsg "Current user: '$USER' does not match '$STEAMCMD_USER'"
+	exit 1
+fi
+
 # ===================================================
 # 03. Mount network drive
 # ===================================================