diff --git a/libraries/SITL/SITL.cpp b/libraries/SITL/SITL.cpp
index 8857e1e1ec..88f1cf0c34 100644
--- a/libraries/SITL/SITL.cpp
+++ b/libraries/SITL/SITL.cpp
@@ -103,6 +103,7 @@ const AP_Param::GroupInfo SITL::var_info2[] = {
     AP_GROUPINFO("TEMP_FLIGHT",  2, SITL,  temp_flight, 35),
     AP_GROUPINFO("TEMP_TCONST",  3, SITL,  temp_tconst, 30),
     AP_GROUPINFO("TEMP_BFACTOR", 4, SITL,  temp_baro_factor, 0),
+    AP_GROUPINFO("GPS_LOCKTIME", 5, SITL,  gps_lock_time, 0),
     AP_GROUPEND
 };
     
diff --git a/libraries/SITL/SITL.h b/libraries/SITL/SITL.h
index 27742c5736..4a62d85ffd 100644
--- a/libraries/SITL/SITL.h
+++ b/libraries/SITL/SITL.h
@@ -83,6 +83,7 @@ public:
     AP_Float arspd_noise;  // in m/s
     AP_Float arspd_fail;   // pitot tube failure
     AP_Float gps_noise; // amplitude of the gps altitude error
+    AP_Int16 gps_lock_time; // delay in seconds before GPS gets lock
 
     AP_Float mag_noise;   // in mag units (earth field is 818)
     AP_Float mag_error;   // in degrees