diff --git a/daemon/json.c b/daemon/json.c
index f77f742d4..10202c499 100644
--- a/daemon/json.c
+++ b/daemon/json.c
@@ -157,8 +157,7 @@ const jsmntok_t *json_get_member(const char *buffer, const jsmntok_t tok[],
 	return NULL;
 }
 
-const jsmntok_t *json_get_arr(const char *buffer, const jsmntok_t tok[],
-			      size_t index)
+const jsmntok_t *json_get_arr(const jsmntok_t tok[], size_t index)
 {
 	const jsmntok_t *t, *end;
 
@@ -195,7 +194,7 @@ const jsmntok_t *json_delve(const char *buffer,
 		case '[':
 			if (tok->type != JSMN_ARRAY)
 				return tal_free(key);
-			tok = json_get_arr(buffer, tok, atol(key));
+			tok = json_get_arr(tok, atol(key));
 			if (!tok)
 				return tal_free(key);
 			/* Must be terminated */
diff --git a/daemon/json.h b/daemon/json.h
index 84b60d308..3f1c50f11 100644
--- a/daemon/json.h
+++ b/daemon/json.h
@@ -56,8 +56,7 @@ const jsmntok_t *json_get_member(const char *buffer, const jsmntok_t tok[],
 				 const char *label);
 
 /* Get index'th array member. */
-const jsmntok_t *json_get_arr(const char *buffer, const jsmntok_t tok[],
-			      size_t index);
+const jsmntok_t *json_get_arr(const jsmntok_t tok[], size_t index);
 
 /* Guide is a string with . for members, [] around indexes. */
 const jsmntok_t *json_delve(const char *buffer,