diff --git a/soitool/modules/module_authentication_board.py b/soitool/modules/module_authentication_board.py
index c31ebf2e232aa0650f0d21bb6a32407025fa84d9..76e529b0a07bf9107c512d5bc021fa95312f6a62 100644
--- a/soitool/modules/module_authentication_board.py
+++ b/soitool/modules/module_authentication_board.py
@@ -159,7 +159,7 @@ class AuthenticationBoardModule(CodeTableBase):
         resize_table(self, columns=False, rows=False, has_headline=True)
 
     def generate_authentication_numbers(self):
-        """Generate two non-equal numbers between 1 and CODE_LENGTH.
+        """Generate two non-equal numbers between 1 and self.code_length.
 
         Returns
         -------