diff --git a/drone/config/spec/configspec_client.ini b/drone/config/spec/configspec_client.ini
index ae964c0..0287009 100644
--- a/drone/config/spec/configspec_client.ini
+++ b/drone/config/spec/configspec_client.ini
@@ -56,6 +56,7 @@ takeoff_level = float(default=0.5)
 # * 'current' - current height of copter
 # * z coordinate in meters
 ground_level = string(default=current)
+check_ground = boolean(default=True)
 # Frame delay in seconds
 frame_delay = float(default=0.1, min=0.01)
 # Available options: