diff --git a/libraries/SITL/SITL.cpp b/libraries/SITL/SITL.cpp
index 7e34dc6f5e..8857e1e1ec 100644
--- a/libraries/SITL/SITL.cpp
+++ b/libraries/SITL/SITL.cpp
@@ -102,6 +102,7 @@ const AP_Param::GroupInfo SITL::var_info2[] = {
     AP_GROUPINFO("TEMP_START",   1, SITL,  temp_start,  25),
     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_GROUPEND
 };
     
diff --git a/libraries/SITL/SITL.h b/libraries/SITL/SITL.h
index 572aa86c52..d6e7ae73f6 100644
--- a/libraries/SITL/SITL.h
+++ b/libraries/SITL/SITL.h
@@ -151,6 +151,7 @@ public:
     AP_Float temp_start;
     AP_Float temp_flight;
     AP_Float temp_tconst;
+    AP_Float temp_baro_factor;
     
     uint16_t irlock_port;