diff --git a/source/games/duke/src/actors.cpp b/source/games/duke/src/actors.cpp
index 814cc2149..70a41a9b7 100644
--- a/source/games/duke/src/actors.cpp
+++ b/source/games/duke/src/actors.cpp
@@ -280,19 +280,19 @@ void lotsofstuff(DDukeActor* actor, int n, int spawntype)
 //
 //---------------------------------------------------------------------------
 
-void ms(short i)
+void ms(DDukeActor* const actor)
 {
 	//T1,T2 and T3 are used for all the sector moving stuff!!!
 
 	short startwall, endwall, x;
 	int tx, ty;
-	auto s = &sprite[i];
+	auto s = &actor->s;
 
 	s->x += (s->xvel * (sintable[(s->ang + 512) & 2047])) >> 14;
 	s->y += (s->xvel * (sintable[s->ang & 2047])) >> 14;
 
-	int j = hittype[i].temp_data[1];
-	int k = hittype[i].temp_data[2];
+	int j = actor->temp_data[1];
+	int k = actor->temp_data[2];
 
 	startwall = sector[s->sectnum].wallptr;
 	endwall = startwall + sector[s->sectnum].wallnum;
diff --git a/source/games/duke/src/dukeactor.h b/source/games/duke/src/dukeactor.h
index de7f7f7c9..c69593766 100644
--- a/source/games/duke/src/dukeactor.h
+++ b/source/games/duke/src/dukeactor.h
@@ -235,6 +235,11 @@ inline int movesprite_ex(DDukeActor* actor, int xchange, int ychange, int zchang
 	return f(actor, xchange, ychange, zchange, cliptype, result);
 }
 
+inline void ms(short i)
+{
+	ms(&hittype[i]);
+}
+
 
 
 END_DUKE_NS
diff --git a/source/games/duke/src/funct.h b/source/games/duke/src/funct.h
index 14cc0043d..c7638fbe3 100644
--- a/source/games/duke/src/funct.h
+++ b/source/games/duke/src/funct.h
@@ -29,7 +29,7 @@ void movefx();
 void moveclouds(double smoothratio);
 
 void RANDOMSCRAP(DDukeActor* i);
-void ms(short i);
+void ms(DDukeActor* i);
 void movecrane(int i, int crane);
 void movefountain(int i, int fountain);
 void moveflammable(int i, int tire, int box, int pool);