diff --git a/net_io.c b/net_io.c
index 2d8c0b8..a24bfc1 100644
--- a/net_io.c
+++ b/net_io.c
@@ -1878,7 +1878,7 @@ __attribute__ ((format (printf,4,5))) static char *appendFATSV(char *p, char *en
     return p;
 }
 
-#define TSV_MAX_PACKET_SIZE 600
+#define TSV_MAX_PACKET_SIZE 800
 #define TSV_VERSION "4E"
 
 static void writeFATSVPositionUpdate(float lat, float lon, float alt)