diff --git a/packages/CLPBN/clpbn.yap b/packages/CLPBN/clpbn.yap
index 9f75234e8..c5090bdcb 100644
--- a/packages/CLPBN/clpbn.yap
+++ b/packages/CLPBN/clpbn.yap
@@ -9,14 +9,13 @@
 		  clpbn_run_solver/3,
 		  clpbn_init_solver/5,
 		  clpbn_run_solver/4,
-		  clpbn_init_graph/1]).
+		  clpbn_init_graph/1,
+		  op( 500, xfy, with)]).
 
 :- use_module(library(atts)).
 :- use_module(library(lists)).
 :- use_module(library(terms)).
 
-:- op( 500, xfy, with).
-
 %
 % avoid the overhead of using goal_expansion/2.
 %