import member/2 from library(lists)

diff --git a/src/prolog/lib/pio.pl b/src/prolog/lib/pio.pl
index 8467dacbb03abfd7af21821e5a920e3997c89461..4c0f9046187692e5e0c7e1fad711225b5181d0b3 100644 (file)
--- a/src/prolog/lib/pio.pl
+++ b/src/prolog/lib/pio.pl
@@ -3,6 +3,7 @@
 
 :- use_module(library(dcgs)).
 :- use_module(library(error)).
+:- use_module(library(lists), [member/2]).
 
 phrase_from_file(NT, File) :-
     phrase_from_file(NT, File, []).