diff --git a/plugins/libplugin.c b/plugins/libplugin.c
index 87bafe965..d9182c281 100644
--- a/plugins/libplugin.c
+++ b/plugins/libplugin.c
@@ -617,6 +617,16 @@ bool rpc_scan_datastore_hex(struct plugin *plugin,
 	return ret;
 }
 
+static struct command_result *datastore_fail(struct command *command,
+					     const char *buf,
+					     const jsmntok_t *result,
+					     void *unused)
+{
+	plugin_err(command->plugin, "datastore failed: %.*s",
+		   json_tok_full_len(result),
+		   json_tok_full(buf, result));
+}
+
 struct command_result *jsonrpc_set_datastore_(struct plugin *plugin,
 					      struct command *cmd,
 					      const char *path,
@@ -635,6 +645,11 @@ struct command_result *jsonrpc_set_datastore_(struct plugin *plugin,
 {
 	struct out_req *req;
 
+	if (!cb)
+		cb = ignore_cb;
+	if (!errcb)
+		errcb = datastore_fail;
+
 	req = jsonrpc_request_start(plugin, cmd, "datastore", cb, errcb, arg);
 
 	json_add_keypath(req->js->jout, "key", path);
diff --git a/plugins/libplugin.h b/plugins/libplugin.h
index d0e9336f5..c90a680c7 100644
--- a/plugins/libplugin.h
+++ b/plugins/libplugin.h
@@ -161,7 +161,9 @@ struct json_stream *jsonrpc_stream_fail_data(struct command *cmd,
 					     int code,
 					     const char *err);
 
-/* Helper to jsonrpc_request_start() and send_outreq() to update datastore. */
+/* Helper to jsonrpc_request_start() and send_outreq() to update datastore.
+ * NULL cb means ignore, NULL errcb means plugin_error.
+*/
 struct command_result *jsonrpc_set_datastore_(struct plugin *plugin,
 					      struct command *cmd,
 					      const char *path,