diff --git a/src/solidity-typechecker/solidity_primitives.ml b/src/solidity-typechecker/solidity_primitives.ml
index 9d9291c..6b4fbbc 100644
--- a/src/solidity-typechecker/solidity_primitives.ml
+++ b/src/solidity-typechecker/solidity_primitives.ml
@@ -17,10 +17,27 @@ open Solidity_exceptions
 
 let error = type_error
 
+module UTILS = struct
+
 let register id p f_desc =
   Solidity_common.add_primitive id p;
   Solidity_tenv.add_primitive_desc id f_desc
 
+let primitive_fun_named ?(returns_lvalue=false)
+    arg_types ret_types function_mutability =
+  Function { function_abs_name = LongIdent.empty;
+             function_params = arg_types;
+             function_returns = List.map (fun t -> (t, None)) ret_types;
+             function_returns_lvalue = returns_lvalue;
+             function_visibility = VPublic;
+             function_mutability;
+             function_override = None;
+             function_selector = None;
+             function_is_method = false; (* can be true *)
+             function_is_primitive = true;
+             function_def = None;
+             function_assigns = [];
+           }
 
 let make_fun = Solidity_type_builder.primitive_fun
 
@@ -47,6 +64,8 @@ let preprocess_arg_1 pos t atl_opt =
       error pos "Need at least 1 argument for function \
                  call, but provided only 0"
 
+end
+open UTILS
 
 let register_primitives () =
 
diff --git a/src/solidity-typechecker/solidity_primitives.mli b/src/solidity-typechecker/solidity_primitives.mli
index 02b95ff..e43bdf3 100644
--- a/src/solidity-typechecker/solidity_primitives.mli
+++ b/src/solidity-typechecker/solidity_primitives.mli
@@ -11,3 +11,37 @@
 (**************************************************************************)
 
 val init : unit -> unit
+
+module UTILS : sig
+  val register :
+    int ->
+    Solidity_common.primitive ->
+    (Solidity_common.pos ->
+     Solidity_checker_TYPES.options ->
+     Solidity_checker_TYPES.type_ option ->
+     Solidity_checker_TYPES.ident_desc option) ->
+    unit
+  val primitive_fun_named :
+    ?returns_lvalue:bool ->
+    (Solidity_checker_TYPES.type_ *
+     Solidity_common.IdentSet.elt option)
+      list ->
+    Solidity_checker_TYPES.type_ list ->
+    Solidity_ast.fun_mutability -> Solidity_checker_TYPES.ident_desc
+
+  val make_var :
+    Solidity_checker_TYPES.type_ -> Solidity_checker_TYPES.ident_desc
+  val make_fun :
+    ?returns_lvalue:bool ->
+    Solidity_checker_TYPES.type_ list ->
+    Solidity_checker_TYPES.type_ list ->
+    Solidity_ast.fun_mutability -> Solidity_checker_TYPES.ident_desc
+  val make_prim_args :
+    Solidity_common.pos ->
+    Solidity_checker_TYPES.options ->
+    Solidity_checker_TYPES.type_ list option
+  val preprocess_arg_0 : 'a -> 'b list option -> 'b list
+  val preprocess_arg_1 :
+    Solidity_common.pos -> 'a -> 'a list option -> 'a list
+
+end