diff --git a/libraries/SITL/SITL.cpp b/libraries/SITL/SITL.cpp
index 60eab93b84..439bd42657 100644
--- a/libraries/SITL/SITL.cpp
+++ b/libraries/SITL/SITL.cpp
@@ -70,6 +70,7 @@ const AP_Param::GroupInfo SITL::var_info[] PROGMEM = {
     AP_GROUPINFO("WIND_DELAY",    40, SITL,  wind_delay, 0),
     AP_GROUPINFO("MAG_OFS",       41, SITL,  mag_ofs, 0),
     AP_GROUPINFO("ACC2_RND",      42, SITL,  accel2_noise, 0),
+    AP_GROUPINFO("ARSP_FAIL",     43, SITL,  aspd_fail, 0),
     AP_GROUPEND
 };
 
diff --git a/libraries/SITL/SITL.h b/libraries/SITL/SITL.h
index 30bca34baf..d54d28e9c3 100644
--- a/libraries/SITL/SITL.h
+++ b/libraries/SITL/SITL.h
@@ -62,6 +62,8 @@ public:
     AP_Float accel2_noise; // in m/s/s
     AP_Vector3f accel_bias; // in m/s/s
     AP_Float aspd_noise;  // in m/s
+    AP_Int8 aspd_fail;    // pitot tube failure
+
     AP_Float mag_noise;   // in mag units (earth field is 818)
     AP_Float mag_error;   // in degrees
     AP_Vector3f mag_mot;  // in mag units per amp