diff --git a/src/aircraft_cmd.cpp b/src/aircraft_cmd.cpp
--- a/src/aircraft_cmd.cpp
+++ b/src/aircraft_cmd.cpp
@@ -41,8 +41,6 @@
 
 #include "safeguards.h"
 
-static const int ROTOR_Z_OFFSET         = 5;    ///< Z Offset between helicopter- and rotorsprite.
-
 static const int PLANE_HOLDING_ALTITUDE = 150;  ///< Altitude of planes in holding pattern (= lowest flight altitude).
 static const int HELI_FLIGHT_ALTITUDE   = 184;  ///< Normal flight altitude of helicopters.