diff --git a/sw/airborne/boards/ardrone/navdata.c b/sw/airborne/boards/ardrone/navdata.c
index 5736b89ca0..7ce108cbec 100644
--- a/sw/airborne/boards/ardrone/navdata.c
+++ b/sw/airborne/boards/ardrone/navdata.c
@@ -105,34 +105,35 @@ static void navdata_write(const uint8_t *buf, size_t count)
 
 static void send_navdata(void) {
   DOWNLINK_SEND_ARDRONE_NAVDATA(DefaultChannel, DefaultDevice,
-      &navdata->taille,
-      &navdata->nu_trame,
-      &navdata->ax,
-      &navdata->ay,
-      &navdata->az,
-      &navdata->vx,
-      &navdata->vy,
-      &navdata->vz,
-      &navdata->temperature_acc,
-      &navdata->temperature_gyro,
-      &navdata->ultrasound,
-      &navdata->us_debut_echo,
-      &navdata->us_fin_echo,
-      &navdata->us_association_echo,
-      &navdata->us_distance_echo,
-      &navdata->us_curve_time,
-      &navdata->us_curve_value,
-      &navdata->us_curve_ref,
-      &navdata->nb_echo,
-      &navdata->sum_echo,
-      &navdata->gradient,
-      &navdata->flag_echo_ini,
-      &navdata->pressure,
-      &navdata->temperature_pressure,
-      &navdata->mx,
-      &navdata->my,
-      &navdata->mz,
-      &navdata->chksum);
+      &navdata.taille,
+      &navdata.nu_trame,
+      &navdata.ax,
+      &navdata.ay,
+      &navdata.az,
+      &navdata.vx,
+      &navdata.vy,
+      &navdata.vz,
+      &navdata.temperature_acc,
+      &navdata.temperature_gyro,
+      &navdata.ultrasound,
+      &navdata.us_debut_echo,
+      &navdata.us_fin_echo,
+      &navdata.us_association_echo,
+      &navdata.us_distance_echo,
+      &navdata.us_curve_time,
+      &navdata.us_curve_value,
+      &navdata.us_curve_ref,
+      &navdata.nb_echo,
+      &navdata.sum_echo,
+      &navdata.gradient,
+      &navdata.flag_echo_ini,
+      &navdata.pressure,
+      &navdata.temperature_pressure,
+      &navdata.mx,
+      &navdata.my,
+      &navdata.mz,
+      &navdata.chksum,
+      &nav_port.checksum_errors);
 }
 #endif