diff --git a/ble/att_server.c b/ble/att_server.c
index f1ed88b8c..20c5680f4 100644
--- a/ble/att_server.c
+++ b/ble/att_server.c
@@ -126,7 +126,7 @@ 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_connectino.mtu = ATT_DEFAULT_MTU;
+                            att_connection.mtu = ATT_DEFAULT_MTU;
                             att_connection.max_mtu = l2cap_max_le_mtu();
                             att_connection.encryption_key_size = 0;
                             att_connection.authenticated = 0;