diff --git a/C4/Reserves.pm b/C4/Reserves.pm
index 5058c51ebb..22a9ecb438 100644
--- a/C4/Reserves.pm
+++ b/C4/Reserves.pm
@@ -1309,7 +1309,7 @@ sub ModReserveFill {
     # now fix the priority on the others (if the priority wasn't
     # already sorted!)....
     unless ( $priority == 0 ) {
-        _FixPriority({ reserve_id => $reserve_id });
+        _FixPriority({ reserve_id => $reserve_id, biblionumber => $biblionumber });
     }
 }