diff --git a/source/core/gameinput.cpp b/source/core/gameinput.cpp
index 88eed570d..5bc9f8580 100644
--- a/source/core/gameinput.cpp
+++ b/source/core/gameinput.cpp
@@ -365,7 +365,7 @@ FSerializer& Serialize(FSerializer& arc, const char* keyname, PlayerHorizon& w,
 		if (arc.isReading())
 		{
 			w.ZzOLDHORIZON = w.ZzHORIZON;
-			w.ohorizoff = w.ZzHORIZOFF;
+			w.ZzOHORIZOFF = w.ZzHORIZOFF;
 			w.inputdisabled = w.inputdisabled;
 			w.resetadjustment();
 		}
diff --git a/source/core/gameinput.h b/source/core/gameinput.h
index 8ff83a8a3..bf30dfb31 100644
--- a/source/core/gameinput.h
+++ b/source/core/gameinput.h
@@ -8,7 +8,7 @@
 
 struct PlayerHorizon
 {
-	DAngle ZzHORIZON, ZzOLDHORIZON, ZzHORIZOFF, ohorizoff;
+	DAngle ZzHORIZON, ZzOLDHORIZON, ZzHORIZOFF, ZzOHORIZOFF;
 
 	friend FSerializer& Serialize(FSerializer& arc, const char* keyname, PlayerHorizon& w, PlayerHorizon* def);
 
@@ -20,16 +20,16 @@ struct PlayerHorizon
 	void backup()
 	{
 		ZzOLDHORIZON = ZzHORIZON;
-		ohorizoff = ZzHORIZOFF;
+		ZzOHORIZOFF = ZzHORIZOFF;
 	}
 	void restore()
 	{
 		ZzHORIZON = ZzOLDHORIZON;
-		ZzHORIZOFF = ohorizoff;
+		ZzHORIZOFF = ZzOHORIZOFF;
 	}
 
 	// Commonly used getters.
-	DAngle osum() { return ZzOLDHORIZON + ohorizoff; }
+	DAngle osum() { return ZzOLDHORIZON + ZzOHORIZOFF; }
 	DAngle sum() { return ZzHORIZON + ZzHORIZOFF; }
 	DAngle interpolatedsum(double const interpfrac) { return interpolatedvalue(osum(), sum(), interpfrac); }
 
diff --git a/source/games/duke/src/gameexec.cpp b/source/games/duke/src/gameexec.cpp
index 0a43d837d..fea1b76b2 100644
--- a/source/games/duke/src/gameexec.cpp
+++ b/source/games/duke/src/gameexec.cpp
@@ -359,7 +359,7 @@ void DoPlayer(bool bSet, int lVar1, int lLabelID, int lVar2, DDukeActor* sActor,
 		break;
 
 	case PLAYER_OHORIZOFF:
-		if (!bSet) SetGameVarID(lVar2, int(ps[iPlayer].horizon.ohorizoff.Tan() * -128.), sActor, sPlayer);
+		if (!bSet) SetGameVarID(lVar2, int(ps[iPlayer].horizon.ZzOHORIZOFF.Tan() * -128.), sActor, sPlayer);
 		break;
 
 	case PLAYER_INVDISPTIME:
@@ -2250,7 +2250,7 @@ int ParseState::parse(void)
 			ps[g_p].horizon.ZzOLDHORIZON = ps[g_p].horizon.ZzHORIZON = nullAngle;
 			ps[g_p].on_crane = nullptr;
 			ps[g_p].frag_ps = g_p;
-			ps[g_p].horizon.ohorizoff = ps[g_p].horizon.ZzHORIZOFF = nullAngle;
+			ps[g_p].horizon.ZzOHORIZOFF = ps[g_p].horizon.ZzHORIZOFF = nullAngle;
 			ps[g_p].opyoff = 0;
 			ps[g_p].wackedbyactor = nullptr;
 			ps[g_p].shield_amount = gs.max_armour_amount;
diff --git a/source/games/duke/src/premap.cpp b/source/games/duke/src/premap.cpp
index 4ac90d766..007cbad1d 100644
--- a/source/games/duke/src/premap.cpp
+++ b/source/games/duke/src/premap.cpp
@@ -126,7 +126,7 @@ void resetplayerstats(int snum)
 	p->footprintshade   = 0;
 	p->jumping_toggle   = 0;
 	p->horizon.ZzOLDHORIZON = p->horizon.ZzHORIZON = DAngle::fromDeg(-17.354);
-	p->horizon.ohorizoff = p->horizon.ZzHORIZOFF = nullAngle;
+	p->horizon.ZzOHORIZOFF = p->horizon.ZzHORIZOFF = nullAngle;
 	p->bobcounter       = 0;
 	p->on_ground        = 0;
 	p->player_par       = 0;