diff --git a/port-source/kam_remake/src/utils/KromUtils.pas b/port-source/kam_remake/src/utils/KromUtils.pas
index a6a1e55..3f5d768 100644
--- a/port-source/kam_remake/src/utils/KromUtils.pas
+++ b/port-source/kam_remake/src/utils/KromUtils.pas
@@ -250,7 +250,7 @@ end;
 
 function CharInSet(C: WideChar; S: TSetOfAnsiChar): Boolean;
 begin
-  Result := (Ord(C) <= MAXBYTE) and (AnsiChar(C) in S);
+  Result := (Ord(C) <= High(Byte)) and (AnsiChar(C) in S);
 end;