diff --git a/Misc/Util.cs b/Misc/Util.cs
index 7280fd095..9568d8d2e 100644
--- a/Misc/Util.cs
+++ b/Misc/Util.cs
@@ -450,7 +450,7 @@ internal static List<cbItem> getCBList(string textfile, string lang)
         internal static List<cbItem> getCBList(string[] inStrings, params int[][] allowed)
         {
             List<cbItem> cbList = new List<cbItem>();
-            if (allowed == null)
+            if (allowed == null || allowed.First() == null)
                 allowed = new[] { Enumerable.Range(0, inStrings.Length).ToArray() };
 
             foreach (int[] list in allowed)