diff --git a/src/ble/gatt-service/battery_service_server.c b/src/ble/gatt-service/battery_service_server.c
index 99762e6e7..1f9af25b7 100644
--- a/src/ble/gatt-service/battery_service_server.c
+++ b/src/ble/gatt-service/battery_service_server.c
@@ -84,7 +84,7 @@ static int battery_service_write_callback(hci_con_handle_t con_handle, uint16_t
 }
 
 static void battery_service_can_send_now(void * context){
-	hci_con_handle_t con_handle = (hci_con_handle_t) context;
+	hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) context;
 	att_server_notify(con_handle, battery_value_handle_value, &battery_value, 1);
 }