diff --git a/lib/include/srsran/asn1/asn1_utils.h b/lib/include/srsran/asn1/asn1_utils.h
index c50038b6a..af8c3770e 100644
--- a/lib/include/srsran/asn1/asn1_utils.h
+++ b/lib/include/srsran/asn1/asn1_utils.h
@@ -599,7 +599,7 @@ public:
   IntType              value;
   integer() = default;
   integer(IntType value_) : value(value_) {}
-              operator IntType() { return value; }
+              operator IntType() const { return value; }
   SRSASN_CODE pack(bit_ref& bref) const { return pack_integer(bref, value, lb, ub, has_ext, is_aligned); }
   SRSASN_CODE unpack(cbit_ref& bref) { return unpack_integer(value, bref, lb, ub, has_ext, is_aligned); }
 };
@@ -1359,6 +1359,33 @@ private:
   separator_t sep;
 };
 
+template <typename T>
+inline auto to_json(json_writer& j, const T& obj) -> decltype(obj.to_json(j))
+{
+  obj.to_json(j);
+}
+
+template <typename T>
+inline void to_json(json_writer& j, const asn1::enumerated<T>& obj)
+{
+  j.write_str(obj.to_string());
+}
+
+template <typename T>
+inline void to_json(json_writer& j, const asn1::dyn_array<T>& lst)
+{
+  j.start_array();
+  for (const auto& o : lst) {
+    to_json(j, o);
+  }
+  j.end_array();
+}
+
+inline void to_json(json_writer& j, int64_t number)
+{
+  j.write_int(number);
+}
+
 /*******************
   Test pack/unpack
 *******************/
diff --git a/lib/include/srsran/asn1/rrc_nr.h b/lib/include/srsran/asn1/rrc_nr.h
index 8e1362f56..2eba2ff82 100644
--- a/lib/include/srsran/asn1/rrc_nr.h
+++ b/lib/include/srsran/asn1/rrc_nr.h
@@ -2254,7 +2254,7 @@ struct setup_release_c {
 
   // choice methods
   setup_release_c() = default;
-  types       type() const { return type_; }
+  types type() const { return type_; }
 
   // getters
   elem_type_paramT_& setup()
@@ -2267,7 +2267,7 @@ struct setup_release_c {
     assert_choice_type(types::setup, type_, "SetupRelease");
     return c;
   }
-  void               set_release() { set(types::release); }
+  void set_release() { set(types::release); }
 
   void set(typename types::options e) { type_ = e; }
 
@@ -2276,8 +2276,11 @@ struct setup_release_c {
     j.start_obj();
     switch (type_) {
       case types::release:
+        j.write_null("release");
         break;
       case types::setup:
+        j.write_fieldname("setup");
+        asn1::to_json(j, setup());
         break;
       default:
         log_invalid_choice_id(type_, "setup_release_c");