diff --git a/modserver/update_mods.sh b/modserver/update_mods.sh
index b27e23e..c407577 100644
--- a/modserver/update_mods.sh
+++ b/modserver/update_mods.sh
@@ -182,6 +182,9 @@ update_mods_for_server() {
 	    *)
 		mod_id=${mod%%^*}
 		mod_name=${mod##*^}
+		if [ ! -d "$LOCAL_MODS/steamapps/workshop/content/$DAYZ_GAME_ID/$mod_id" ] ; then
+		    die "$LOCAL_MODS/steamapps/workshop/content/$DAYZ_GAME_ID/$mod_id does not exist"
+		fi
 		do_sync "$LOCAL_MODS/steamapps/workshop/content/$DAYZ_GAME_ID/$mod_id"/ "$mods_to_copy/@${mod_name}"
 		printf '@%s\n' "$mod_name" >> "$mods_to_copy/mods.txt"
 	esac