diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index 2706378154..53457200df 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -1572,7 +1572,6 @@ bool P_SeekerMissile (AActor *actor, angle_t thresh, angle_t turnMax, bool preci
 // Returns the actor's old floorz.
 //
 #define STOPSPEED			0x1000
-#define FRICTION			0xe800
 #define CARRYSTOPSPEED		(STOPSPEED*32/3)
 
 fixed_t P_XYMovement (AActor *mo, fixed_t scrollx, fixed_t scrolly)