diff --git a/lightningd/json.c b/lightningd/json.c
index 4a9f2b8cb..6a3cc7d76 100644
--- a/lightningd/json.c
+++ b/lightningd/json.c
@@ -308,6 +308,24 @@ void json_add_u64(struct json_stream *result, const char *fieldname,
 	json_add_member(result, fieldname, "%"PRIu64, value);
 }
 
+void json_add_s64(struct json_stream *result, const char *fieldname,
+		  int64_t value)
+{
+	json_add_member(result, fieldname, "%"PRIi64, value);
+}
+
+void json_add_u32(struct json_stream *result, const char *fieldname,
+		  uint32_t value)
+{
+	json_add_member(result, fieldname, "%d", value);
+}
+
+void json_add_s32(struct json_stream *result, const char *fieldname,
+		  int32_t value)
+{
+	json_add_member(result, fieldname, "%d", value);
+}
+
 void json_add_literal(struct json_stream *result, const char *fieldname,
 		      const char *literal, int len)
 {
diff --git a/lightningd/json.h b/lightningd/json.h
index 78d47fb22..c30cfd9f6 100644
--- a/lightningd/json.h
+++ b/lightningd/json.h
@@ -127,6 +127,15 @@ void json_add_num(struct json_stream *result, const char *fieldname,
 /* '"fieldname" : value' or 'value' if fieldname is NULL */
 void json_add_u64(struct json_stream *result, const char *fieldname,
 		  uint64_t value);
+/* '"fieldname" : value' or 'value' if fieldname is NULL */
+void json_add_s64(struct json_stream *result, const char *fieldname,
+		  int64_t value);
+/* '"fieldname" : value' or 'value' if fieldname is NULL */
+void json_add_u32(struct json_stream *result, const char *fieldname,
+		  uint32_t value);
+/* '"fieldname" : value' or 'value' if fieldname is NULL */
+void json_add_s32(struct json_stream *result, const char *fieldname,
+		  int32_t value);
 /* '"fieldname" : true|false' or 'true|false' if fieldname is NULL */
 void json_add_bool(struct json_stream *result, const char *fieldname,
 		   bool value);