diff --git a/source/games/duke/src/actors.cpp b/source/games/duke/src/actors.cpp
index fd33b236c..e3df0294d 100644
--- a/source/games/duke/src/actors.cpp
+++ b/source/games/duke/src/actors.cpp
@@ -48,7 +48,7 @@ This file is a combination of code from the following sources:
 
 BEGIN_DUKE_NS
 
-int adjustfall(spritetype* s, int c);
+int adjustfall(DDukeActor* s, int c);
 
 
 //---------------------------------------------------------------------------
@@ -5030,10 +5030,10 @@ void getglobalz(DDukeActor* actor)
 //
 //---------------------------------------------------------------------------
 
-void makeitfall(int i)
+void makeitfall(DDukeActor* actor)
 {
-	spritetype *s = &sprite[i];
-	int hz,lz,c;
+	auto s = &actor->s;
+	int c;
 
 	if( fi.floorspace(s->sectnum) )
 		c = 0;
@@ -5046,18 +5046,21 @@ void makeitfall(int i)
 	
 	if (isRRRA())
 	{
-		c = adjustfall(s, c); // this accesses sprite indices and cannot be in shared code. Should be done better.
+		c = adjustfall(actor, c); // this accesses sprite indices and cannot be in shared code. Should be done better.
 	}
 
-	if( ( s->statnum == STAT_ACTOR || s->statnum == STAT_PLAYER || s->statnum == STAT_ZOMBIEACTOR || s->statnum == STAT_STANDABLE ) )
-		getzrange(s->x,s->y,s->z-(FOURSLEIGHT),s->sectnum,&hittype[i].ceilingz,&hz,&hittype[i].floorz,&lz,127L,CLIPMASK0);
+	if ((s->statnum == STAT_ACTOR || s->statnum == STAT_PLAYER || s->statnum == STAT_ZOMBIEACTOR || s->statnum == STAT_STANDABLE))
+	{
+		Collision c;
+		getzrange_ex(s->x, s->y, s->z - (FOURSLEIGHT), s->sectnum, &actor->ceilingz, c, &actor->floorz, c, 127, CLIPMASK0);
+	}
 	else
 	{
-		hittype[i].ceilingz = sector[s->sectnum].ceilingz;
-		hittype[i].floorz	= sector[s->sectnum].floorz;
+		actor->ceilingz = sector[s->sectnum].ceilingz;
+		actor->floorz	= sector[s->sectnum].floorz;
 	}
 
-	if( s->z < hittype[i].floorz-(FOURSLEIGHT) )
+	if( s->z < actor->floorz-(FOURSLEIGHT) )
 	{
 		if( sector[s->sectnum].lotag == 2 && s->zvel > 3122 )
 			s->zvel = 3144;
@@ -5066,9 +5069,9 @@ void makeitfall(int i)
 		else s->zvel = 6144;
 		s->z += s->zvel;
 	}
-	if( s->z >= hittype[i].floorz-(FOURSLEIGHT) )
+	if( s->z >= actor->floorz-(FOURSLEIGHT) )
 	{
-		s->z = hittype[i].floorz - FOURSLEIGHT;
+		s->z = actor->floorz - FOURSLEIGHT;
 		s->zvel = 0;
 	}
 }
diff --git a/source/games/duke/src/actors_r.cpp b/source/games/duke/src/actors_r.cpp
index beb84bb15..49261e81f 100644
--- a/source/games/duke/src/actors_r.cpp
+++ b/source/games/duke/src/actors_r.cpp
@@ -3734,11 +3734,11 @@ void moveeffectors_r(void)   //STATNUM 3
 //
 //---------------------------------------------------------------------------
 
-int adjustfall(spritetype *s, int c)
+int adjustfall(DDukeActor *actor, int c)
 {
-	if ((s->picnum == BIKERB || s->picnum == CHEERB) && c == gc)
+	if ((actor->s.picnum == BIKERB || actor->s.picnum == CHEERB) && c == gc)
 		c = gc>>2;
-	else if (s->picnum == BIKERBV2 && c == gc)
+	else if (actor->s.picnum == BIKERBV2 && c == gc)
 		c = gc>>3;
 	return c;
 }
diff --git a/source/games/duke/src/dukeactor.h b/source/games/duke/src/dukeactor.h
index 93427361d..16f92b446 100644
--- a/source/games/duke/src/dukeactor.h
+++ b/source/games/duke/src/dukeactor.h
@@ -259,9 +259,9 @@ inline void execute(DDukeActor* act, int a, int b)
 	execute(act->GetIndex(), a, b);
 }
 
-inline void makeitfall(DDukeActor* act)
+inline void makeitfall(int act)
 {
-	makeitfall(act->GetIndex());
+	makeitfall(&hittype[act]);
 }
 
 inline void getglobalz(int act)
diff --git a/source/games/duke/src/funct.h b/source/games/duke/src/funct.h
index 1c5f4f542..23e9a28b5 100644
--- a/source/games/duke/src/funct.h
+++ b/source/games/duke/src/funct.h
@@ -170,7 +170,7 @@ void doorders(const CompletionFunc& func);
 
 void LoadActor(int i, int p, int x);
 void execute(int s, int p, int d);
-void makeitfall(int s);
+void makeitfall(DDukeActor* s);
 int furthestangle(int snum, int angDiv);
 void getglobalz(DDukeActor* s);
 void OnEvent(int id, int pnum = -1, int snum = -1, int dist = -1);