diff --git a/components/ideintf/idetextconverter.pas b/components/ideintf/idetextconverter.pas
index d0107036f1..e3995598bc 100644
--- a/components/ideintf/idetextconverter.pas
+++ b/components/ideintf/idetextconverter.pas
@@ -18,6 +18,10 @@ unit IDETextConverter;
 
 {$mode objfpc}{$H+}
 
+{$IF FPC_FULLVERSION>30300}
+  {$WARN 6060 off : not all possible case cases}
+{$ENDIF}
+
 interface
 
 uses