diff --git a/plugin/bignums_syntax.ml b/plugin/bignums_syntax.ml
index 568b91b..cd0cd32 100644
--- a/plugin/bignums_syntax.ml
+++ b/plugin/bignums_syntax.ml
@@ -198,7 +198,7 @@ let bigN_list_of_constructors =
 let declare_numeral_interpreter uid sc dir interp (patl,uninterp,b) =
   let open Notation in
   register_bignumeral_interpretation uid (interp,uninterp);
-  { pt_local = false;
+  enable_prim_token_interpretation { pt_local = false;
     pt_scope = sc;
     pt_interp_info = Uid uid;
     pt_required = dir;
@@ -206,7 +206,7 @@ let declare_numeral_interpreter uid sc dir interp (patl,uninterp,b) =
     pt_in_match = b }
 
 (* Actually declares the interpreter for bigN *)
-let _ =
+let () =
   Notation.declare_scope bigN_scope;
   declare_numeral_interpreter "bignums.bigN" bigN_scope
     (bigN_path, bigN_module)
@@ -244,7 +244,7 @@ let uninterp_bigZ (AnyGlobConstr rc) =
     None
 
 (* Actually declares the interpreter for bigZ *)
-let _ =
+let () =
   Notation.declare_scope bigZ_scope;
   declare_numeral_interpreter "bignums.bigZ" bigZ_scope
     (bigZ_path, bigZ_module)
@@ -266,7 +266,7 @@ let uninterp_bigQ (AnyGlobConstr rc) =
   with Non_closed -> None
 
 (* Actually declares the interpreter for bigQ *)
-let _ =
+let () =
   Notation.declare_scope bigQ_scope;
   declare_numeral_interpreter "bignums.bigQ" bigQ_scope
     (bigQ_path, bigQ_module)