diff --git a/libraries/AP_GPS/AP_GPS_Glitch.h b/libraries/AP_GPS/AP_GPS_Glitch.h
index 52d92b1acd..d965a57a1d 100644
--- a/libraries/AP_GPS/AP_GPS_Glitch.h
+++ b/libraries/AP_GPS/AP_GPS_Glitch.h
@@ -13,8 +13,8 @@
 #include <AP_Math.h>
 #include <AP_GPS.h>
 
-#define GPS_GLITCH_ACCEL_MAX_CMSS   1000.0f // vehicle can accelerate at up to 10m/s/s in any direction
-#define GPS_GLITCH_RADIUS_CM        1000.0f // gps movement within 10m of current position are always ok
+#define GPS_GLITCH_ACCEL_MAX_CMSS   500.0f  // vehicle can accelerate at up to 5m/s/s in any direction
+#define GPS_GLITCH_RADIUS_CM        500.0f  // gps movement within 5m of current position are always ok
 
 /// @class	GPS_Glitch
 /// @brief	GPS Glitch protection class