diff --git a/source/games/duke/src/actors.cpp b/source/games/duke/src/actors.cpp
index 3a7e4ded7..2c263dd8f 100644
--- a/source/games/duke/src/actors.cpp
+++ b/source/games/duke/src/actors.cpp
@@ -5038,7 +5038,7 @@ void alterang(int ang, DDukeActor* actor, int playernum)
 
 		auto Owner = actor->GetOwner();
 		if (Owner->spr.picnum == TILE_APLAYER)
-			goalang = getangle(actor->ovel.X - actor->spr.pos.X, actor->lastvy - actor->spr.pos.Y);
+			goalang = getangle(actor->ovel.X - actor->spr.pos.X, actor->ovel.Y - actor->spr.pos.Y);
 		else
 			goalang = getangle(Owner->spr.pos.X - actor->spr.pos.X, Owner->spr.pos.Y - actor->spr.pos.Y);
 
diff --git a/source/games/duke/src/gameexec.cpp b/source/games/duke/src/gameexec.cpp
index 7962f6e1c..0e27dece3 100644
--- a/source/games/duke/src/gameexec.cpp
+++ b/source/games/duke/src/gameexec.cpp
@@ -1325,8 +1325,8 @@ void DoActor(bool bSet, int lVar1, int lLabelID, int lVar2, DDukeActor* sActor,
 		else SetGameVarID(lVar2, act->ovel.X, sActor, sPlayer);
 		break;
 	case ACTOR_HTLASTVY:
-		if (bSet) act->lastvy = lValue;
-		else SetGameVarID(lVar2, act->lastvy, sActor, sPlayer);
+		if (bSet) act->ovel.Y = lValue;
+		else SetGameVarID(lVar2, act->ovel.Y, sActor, sPlayer);
 		break;
 	case ACTOR_HTBPOSX:
 		if (bSet) act->spr.opos.X = lValue;
@@ -1496,14 +1496,14 @@ static bool ifcansee(DDukeActor* actor, int pnum)
 	{
 		// search around for target player
 		// also modifies 'target' x&y if found.
-		j = furthestcanseepoint(actor, tosee, &actor->ovel.X, &actor->lastvy);
+		j = furthestcanseepoint(actor, tosee, &actor->ovel.X, &actor->ovel.Y);
 	}
 	else
 	{
 		// else, they did see it.
 		// save where we were looking..
 		actor->ovel.X = tosee->spr.pos.X;
-		actor->lastvy = tosee->spr.pos.Y;
+		actor->ovel.Y = tosee->spr.pos.Y;
 	}
 
 	if (j == 1 && (actor->spr.statnum == STAT_ACTOR || actor->spr.statnum == STAT_STANDABLE))
@@ -3151,7 +3151,7 @@ int ParseState::parse(void)
 		i = *(insptr++);	// ID of def
 
 		// g_ac->lastvx and lastvy are last known location of target.
-		ang = getangle(g_ac->ovel.X - g_ac->spr.pos.X, g_ac->lastvy - g_ac->spr.pos.Y);
+		ang = getangle(g_ac->ovel.X - g_ac->spr.pos.X, g_ac->ovel.Y - g_ac->spr.pos.Y);
 		SetGameVarID(i, ang, g_ac, g_p);
 		break;
 	}
diff --git a/source/games/duke/src/savegame.cpp b/source/games/duke/src/savegame.cpp
index 6a35cb8d2..5cb6fdf9b 100644
--- a/source/games/duke/src/savegame.cpp
+++ b/source/games/duke/src/savegame.cpp
@@ -312,7 +312,7 @@ void DDukeActor::Serialize(FSerializer& arc)
 		("floorz", floorz)
 		("ceilingz", ceilingz)
 		("lastvx", ovel.X)
-		("lastvy", lastvy)
+		("lastvy", ovel.Y)
 		("aflags", aflags)
 		("saved_ammo", saved_ammo)
 		("temp_actor", temp_actor)
diff --git a/source/games/duke/src/spawn.cpp b/source/games/duke/src/spawn.cpp
index 3608ae4b7..e5c6e8b28 100644
--- a/source/games/duke/src/spawn.cpp
+++ b/source/games/duke/src/spawn.cpp
@@ -81,7 +81,7 @@ DDukeActor* EGS(sectortype* whatsectp, int s_x, int s_y, int s_z, int s_pn, int8
 	act->spr.backuploc();
 
 	act->ovel.X = 0;
-	act->lastvy = 0;
+	act->ovel.Y = 0;
 
 	act->timetosleep = 0;
 	act->actorstayput = nullptr;
@@ -153,7 +153,7 @@ bool initspriteforspawn(DDukeActor* act, const std::initializer_list<int> &exclu
 	act->ceilingz = act->spr.sector()->ceilingz;
 
 	act->ovel.X = 0;
-	act->lastvy = 0;
+	act->ovel.Y = 0;
 	act->actorstayput = nullptr;
 
 	act->temp_data[0] = act->temp_data[1] = act->temp_data[2] = act->temp_data[3] = act->temp_data[4] = act->temp_data[5] = 0;
diff --git a/source/games/duke/src/types.h b/source/games/duke/src/types.h
index 298de91e1..6e726b6f0 100644
--- a/source/games/duke/src/types.h
+++ b/source/games/duke/src/types.h
@@ -38,7 +38,7 @@ public:
 	short tempang, dispicnum;
 	short timetosleep;
 	vec2_t ovel;
-	int floorz, ceilingz, ovel.X, lastvy, aflags;
+	int floorz, ceilingz, aflags;
 	union
 	{
 		int saved_ammo;