diff --git a/src/analysis/ppx_expand.ml b/src/analysis/ppx_expand.ml
index f50b912d..5d2add8b 100644
--- a/src/analysis/ppx_expand.ml
+++ b/src/analysis/ppx_expand.ml
@@ -143,10 +143,7 @@ let get_ppxed_source ~ppxed_parsetree ~pos ppx_kind_with_attr :
   | Sig_item _, attr_loc ->
     let exp =
       Pprintast.signature Format.str_formatter
-        { psg_modalities = [];
-          psg_items = List.rev !signature;
-          psg_loc = Location.none
-        };
+        (Ast_helper.Sg.mk (List.rev !signature));
       Format.flush_str_formatter ()
     in
     { code = exp; attr_start = attr_loc.loc_start; attr_end = attr_loc.loc_end }
diff --git a/src/analysis/ptyp_of_type.ml b/src/analysis/ptyp_of_type.ml
index ac4be025..345b7824 100644
--- a/src/analysis/ptyp_of_type.ml
+++ b/src/analysis/ptyp_of_type.ml
@@ -277,14 +277,10 @@ and signature_item (str_item : Types.signature_item) =
     Sig.text [ Docstrings.docstring str Location.none ] |> List.hd
 
 and signature (items : Types.signature) =
-  { psg_modalities = [];
-    psg_items =
-      List.map (group_items items) ~f:(function
-        | Item item -> signature_item item
-        | Type (rec_flag, type_decls) ->
-          Ast_helper.Sig.type_ rec_flag type_decls);
-    psg_loc = Location.none
-  }
+  Ast_helper.Sg.mk
+    (List.map (group_items items) ~f:(function
+      | Item item -> signature_item item
+      | Type (rec_flag, type_decls) -> Ast_helper.Sig.type_ rec_flag type_decls))
 
 and group_items (items : Types.signature_item list) =
   let rec read_type type_acc items =
diff --git a/src/kernel/extension.ml b/src/kernel/extension.ml
index 10693255..c15c4a0b 100644
--- a/src/kernel/extension.ml
+++ b/src/kernel/extension.ml
@@ -166,7 +166,7 @@ let combine_sigs sigs : Parsetree.signature =
           psig_loc = Location.none
         })
   in
-  { psg_modalities = []; psg_items = items; psg_loc = Location.none }
+  Ast_helper.Sg.mk items
 
 let register exts env =
   (* Log errors ? *)
diff --git a/src/kernel/mtyper.ml b/src/kernel/mtyper.ml
index ebdd2c41..5e1ac03e 100644
--- a/src/kernel/mtyper.ml
+++ b/src/kernel/mtyper.ml
@@ -146,7 +146,8 @@ let[@tail_mod_cons] rec type_signature caught env sg psg_modalities psg_loc =
           sig_sloc = _
         } =
       Typemod.merlin_transl_signature env sg
-        { psg_modalities; psg_items = [ parsetree_item ]; psg_loc }
+        (Ast_helper.Sg.mk ~loc:psg_loc ~modalities:psg_modalities
+           [ parsetree_item ])
     in
     let part_rev_sg = List.rev_append sig_type sg in
     let item =
@@ -269,10 +270,8 @@ let type_interface config caught (parsetree : Parsetree.signature) =
        }
         : Typedtree.signature) =
     Typemod.merlin_transl_signature Env.empty []
-      { psg_modalities = parsetree.psg_modalities;
-        psg_items = [];
-        psg_loc = parsetree.psg_loc
-      }
+      (Ast_helper.Sg.mk ~modalities:parsetree.psg_modalities
+         ~loc:parsetree.psg_loc [])
   in
   let value =
     Interface_items