diff --git a/lightningd/json.c b/lightningd/json.c
index 09b876343..bbc533a2c 100644
--- a/lightningd/json.c
+++ b/lightningd/json.c
@@ -472,3 +472,9 @@ void json_add_secret(struct json_stream *response, const char *fieldname,
 {
 	json_add_hex(response, fieldname, secret, sizeof(struct secret));
 }
+
+void json_add_sha256(struct json_stream *result, const char *fieldname,
+		     const struct sha256 *hash)
+{
+	json_add_hex(result, fieldname, hash, sizeof(*hash));
+}
diff --git a/lightningd/json.h b/lightningd/json.h
index 52183ccdf..1eaaf92d6 100644
--- a/lightningd/json.h
+++ b/lightningd/json.h
@@ -214,4 +214,7 @@ void json_add_timeabs(struct json_stream *result, const char *fieldname,
 void json_add_time(struct json_stream *result, const char *fieldname,
 			  struct timespec ts);
 
+void json_add_sha256(struct json_stream *result, const char *fieldname,
+		     const struct sha256 *hash);
+
 #endif /* LIGHTNING_LIGHTNINGD_JSON_H */