diff --git a/Main.lua b/Main.lua
index 0d9e58d..227e820 100644
--- a/Main.lua
+++ b/Main.lua
@@ -46,8 +46,8 @@ function Init()
   if settings.FieldToPerformLookupWith:lower() == "{default}" then
     settings.FieldToPerformLookupWith = DataMapping.BarcodeFieldMapping[product];
   end
-
-  if settings.FieldToPerformLookupWith:find("^%a+%.%a+$") then
+  -- Allow fields with digits like Transaction.ItemInfo1 to be seen as valid
+  if settings.FieldToPerformLookupWith:find("^%w+%.%w+$") then
     settings.FieldToPerformLookupWith = Utility.StringSplit(".", settings.FieldToPerformLookupWith);
     settings.FieldToPerformLookupWith[1] = Utility.Trim(settings.FieldToPerformLookupWith[1]);
     settings.FieldToPerformLookupWith[2] = Utility.Trim(settings.FieldToPerformLookupWith[2]);