diff --git a/gap/bytable.gi b/gap/bytable.gi
index 1ae2223..f5d1075 100644
--- a/gap/bytable.gi
+++ b/gap/bytable.gi
@@ -42,7 +42,7 @@ end);
 # First a helper function
 MagmaNumber@ := 1;
 MagmaLetters@ := "ABCDEFGHJKMNPSTUV";
-MagmaBase@ := Length(magmaLetters@);
+MagmaBase@ := Length(MagmaLetters@);
 NextMagmaString@ := function(filts)
   local str, n;
   str := "l";