diff --git a/prolog/metta_lang/metta_types.pl b/prolog/metta_lang/metta_types.pl
index cffd948f6c..8e0ff9fa9d 100755
--- a/prolog/metta_lang/metta_types.pl
+++ b/prolog/metta_lang/metta_types.pl
@@ -2422,7 +2422,7 @@
     ;   fallback_logic(X, Result)
     ).
 
-:- writeln('
+ffffff:- writeln('
     ?- test_simple_guard.
     ?- test_fallback.
     ?- test_prioritized.