diff --git a/Adafruit_GPS.h b/Adafruit_GPS.h
index a2c968b..4474dc6 100644
--- a/Adafruit_GPS.h
+++ b/Adafruit_GPS.h
@@ -64,7 +64,7 @@ All text above must be included in any redistribution
 
 // request for updates on antenna status 
 #define PGCMD_ANTENNA "$PGCMD,33,1*6C" 
-#define PGCMD_NOANTENNA "$PGCMD,33,0*6C" 
+#define PGCMD_NOANTENNA "$PGCMD,33,0*6D" 
 
 // how long to wait when we're looking for a response
 #define MAXWAITSENTENCE 5