diff --git a/pack.pl b/pack.pl
index e4cb1f5..abaead7 100644
--- a/pack.pl
+++ b/pack.pl
@@ -1,5 +1,5 @@
 name('tus').
-version('0.0.14').
+version('0.0.17').
 keywords(['tus', 'file', 'upload', 'http']).
 title('TUS file transport protocol in prolog').
 home( 'https://github.com/terminusdb/tus' ).
diff --git a/prolog/tus/parse.pl b/prolog/tus/parse.pl
index 7fb3878..37c3880 100644
--- a/prolog/tus/parse.pl
+++ b/prolog/tus/parse.pl
@@ -22,7 +22,12 @@
     when(
         (   ground(Assoc)
         ;   ground(Parts)),
-        assoc_metadata_parts(Assoc, Parts)
+        % once/1 needed for SWI-Prolog 10: assoc_metadata_parts/2 has two clauses
+        % that can both match when Assoc is unbound, leaving a choicepoint.
+        % SWI-Prolog 10 preserves choicepoints in delayed goals more strictly than v9.
+        % The predicate logically has exactly one solution, so once/1 eliminates
+        % the choicepoint warning while preserving correct semantics.
+        once(assoc_metadata_parts(Assoc, Parts))
     ),
     atomic_list_concat(Parts, ',', Atom).