diff --git a/ble/att_server.c b/ble/att_server.c
index 29ee2c80c..dbe0a8cff 100644
--- a/ble/att_server.c
+++ b/ble/att_server.c
@@ -124,7 +124,7 @@ static void att_event_packet_handler (uint8_t packet_type, uint16_t channel, uin
                             bt_flip_addr(att_client_address, &packet[8]);
                             // reset connection properties
                             att_connection.con_handle = READ_BT_16(packet, 4);
-                            att_connection.mtu = 23;
+                            att_connection.mtu = l2cap_max_mtu_for_handle(peripheral->handle);;
                             att_connection.encryption_key_size = 0;
                             att_connection.authenticated = 0;
 		                	att_connection.authorized = 0;