diff --git a/src/gps.c b/src/gps.c
--- a/src/gps.c
+++ b/src/gps.c
@@ -234,6 +234,20 @@ void gps_poweron(void)
 void gps_poweroff(void)
 {
     // NOTE: pchannel
+	position.hour = 0;
+	position.minute = 0;
+	position.second = 0;
+	position.altitude = 0;
+	position.latitude = 0;
+	position.longitude = 0;
+	position.day = 0;
+	position.month = 0;
+	position.fixtype = 0;
+	position.valid = 0;
+	position.pdop = 0;
+	position.sats_in_solution = 0;
+	position.speed = 0;
+
     uart_deinit();
     HAL_GPIO_WritePin(GPS_NOTEN, 1);
     gpson = 0;