diff --git a/include/textset.cpp b/include/textset.cpp
index 48245d774..a2bbd0628 100755
--- a/include/textset.cpp
+++ b/include/textset.cpp
@@ -96,8 +96,9 @@ int TText_recordset::find_column(const char* column) const
       for (const char* c = column; isalpha(*c); c++)
       {
         n *= 26;
-        n += toupper(*c)-'A';
+        n += toupper(*c)-'@';
       }
+      n--;
     }
   }
   return n;