diff --git a/src/p_map.cpp b/src/p_map.cpp
index 5ff4619d2a..66becf1fe5 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -4726,11 +4726,11 @@ DEFINE_ACTION_FUNCTION(AActor, LineAttack)
 	PARAM_CLASS(puffType, AActor);
 	PARAM_INT_DEF(flags);
 	PARAM_POINTER_DEF(victim, FTranslatedLineTarget);
-	PARAM_FLOAT_DEF(sz);
+	PARAM_FLOAT_DEF(offsetz);
 
 	int acdmg;
 	if (puffType == nullptr) puffType = PClass::FindActor("BulletPuff");	// P_LineAttack does not work without a puff to take info from.
-	auto puff = P_LineAttack(self, angle, distance, pitch, damage, damageType, puffType, flags, victim, &acdmg, sz);
+	auto puff = P_LineAttack(self, angle, distance, pitch, damage, damageType, puffType, flags, victim, &acdmg, offsetz);
 	if (numret > 0) ret[0].SetObject(puff);
 	if (numret > 1) ret[1].SetInt(acdmg), numret = 2;
 	return numret;
diff --git a/wadsrc/static/zscript/actor.txt b/wadsrc/static/zscript/actor.txt
index 008a05d41d..49d2944650 100644
--- a/wadsrc/static/zscript/actor.txt
+++ b/wadsrc/static/zscript/actor.txt
@@ -585,7 +585,7 @@ class Actor : Thinker native
 	native virtual int DamageMobj(Actor inflictor, Actor source, int damage, Name mod, int flags = 0, double angle = 0);
 	native void PoisonMobj (Actor inflictor, Actor source, int damage, int duration, int period, Name type);
 	native double AimLineAttack(double angle, double distance, out FTranslatedLineTarget pLineTarget = null, double vrange = 0., int flags = 0, Actor target = null, Actor friender = null);
-	native Actor, int LineAttack(double angle, double distance, double pitch, int damage, Name damageType, class<Actor> pufftype, int flags = 0, out FTranslatedLineTarget victim = null, double sz = 0.);
+	native Actor, int LineAttack(double angle, double distance, double pitch, int damage, Name damageType, class<Actor> pufftype, int flags = 0, out FTranslatedLineTarget victim = null, double offsetz = 0.);
 	native bool CheckSight(Actor target, int flags = 0);
 	native bool IsVisible(Actor other, bool allaround, LookExParams params = null);
 	native bool HitFriend();