diff --git a/wadsrc/static/zscript/doom/lostsoul.txt b/wadsrc/static/zscript/doom/lostsoul.txt
index 89cefc42a..7d918aa10 100644
--- a/wadsrc/static/zscript/doom/lostsoul.txt
+++ b/wadsrc/static/zscript/doom/lostsoul.txt
@@ -90,19 +90,19 @@ class BetaSkull : LostSoul
 
 extend class Actor
 {
-	const SKULLSPEED = 20;
+	const DEFSKULLSPEED = 20;
 	
-	void A_SkullAttack(double skullspeed = SKULLSPEED)
+	void A_SkullAttack(double skullspeed = DEFSKULLSPEED)
 	{
 		if (target == null) return;
 
-		if (skullspeed <= 0) skullspeed = SKULLSPEED;
+		if (skullspeed <= 0) skullspeed = DEFSKULLSPEED;
 
 		bSkullfly = true;
 		A_PlaySound(AttackSound, CHAN_VOICE);
 		A_FaceTarget();
 		VelFromAngle(skullspeed);
-		Vel.Z = (target.pos.Z + target.Height/2 - pos.Z) / DistanceBySpeed(target, speed);
+		Vel.Z = (target.pos.Z + target.Height/2 - pos.Z) / DistanceBySpeed(target, skullspeed);
 	}
 
 	void A_BetaSkullAttack()