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-rw-r--r--driver_nmea0183.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/driver_nmea0183.c b/driver_nmea0183.c
index 1488352a..5305806a 100644
--- a/driver_nmea0183.c
+++ b/driver_nmea0183.c
@@ -520,7 +520,7 @@ static int nmeaid_to_prn(char *talker, int satnum)
// NMEA-ID (33..64) to SBAS PRN 120-151.
if (satnum >= 33 && satnum <= 64)
satnum += 87;
- if (satnum < 32) {
+ if (satnum != 0 && satnum < 32) {
/* map Beidou IDs */
if (talker[0] == 'B' && talker[1] == 'D')
satnum += 200;