diff --git a/source/games/duke/src/actors_d.cpp b/source/games/duke/src/actors_d.cpp
index 4017c5ba9..aeb16c1f0 100644
--- a/source/games/duke/src/actors_d.cpp
+++ b/source/games/duke/src/actors_d.cpp
@@ -3524,7 +3524,7 @@ void move_d(DDukeActor *actor, int playernum, int xvel)
 		goalang = VecToAngle(newpos - actor->spr.pos.XY());
 		angdif = deltaangle(actor->spr.angle, goalang) * 0.25;
 		if (angdif > -DAngle22_5/16 && angdif < nullAngle) angdif = nullAngle;
-		actor->spr.angle = angdif;
+		actor->spr.angle += angdif;
 	}
 
 	if (actor->temp_data[1] == 0 || a == 0)
diff --git a/source/games/duke/src/actors_r.cpp b/source/games/duke/src/actors_r.cpp
index 5c4e0cc20..b8944eeb2 100644
--- a/source/games/duke/src/actors_r.cpp
+++ b/source/games/duke/src/actors_r.cpp
@@ -3537,7 +3537,7 @@ void move_r(DDukeActor *actor, int pnum, int xvel)
 		goalang = VecToAngle(newpos - actor->spr.pos.XY());
 		angdif = deltaangle(actor->spr.angle, goalang) * 0.25;
 		if (angdif > -DAngle22_5 / 16 && angdif < nullAngle) angdif = nullAngle;
-		actor->spr.angle = angdif;
+		actor->spr.angle += angdif;
 	}
 
 	if (actor->temp_data[1] == 0 || a == 0)