diff --git a/wadsrc/static/zscript/games/duke/actors/soundcontroller.zs b/wadsrc/static/zscript/games/duke/actors/soundcontroller.zs
index 49009b784..501028b06 100644
--- a/wadsrc/static/zscript/games/duke/actors/soundcontroller.zs
+++ b/wadsrc/static/zscript/games/duke/actors/soundcontroller.zs
@@ -45,7 +45,7 @@ class DukeSoundController : DukeActor
 			let sec = self.sector;
 			if (self.lotag < 999 && sec.lotag >= 0 && sec.lotag < ST_9_SLIDING_ST_DOOR && snd_ambience && sec.floorz != sec.ceilingz)
 			{
-				int flags = Duke.GetSoundFlags(self.lotag);
+				int flags = Duke.GetSoundFlags(Raze.FindSoundByResID(self.lotag));
 				if (flags & Duke.SF_MSFX)
 				{
 					double distance = (p.actor.pos - self.pos).Length();