diff --git a/src/s_sound.cpp b/src/s_sound.cpp
index 544149ca3..eac0093a7 100644
--- a/src/s_sound.cpp
+++ b/src/s_sound.cpp
@@ -491,14 +491,14 @@ void S_PrecacheLevel ()
 				actor->MarkPrecacheSounds();
 			}
 		}
-		for (auto i : gameinfo.PrecachedSounds)
+		for (auto snd : gameinfo.PrecachedSounds)
 		{
-			level.info->PrecacheSounds[i].MarkUsed();
+			FSoundID(snd).MarkUsed();
 		}
 		// Precache all extra sounds requested by this map.
-		for (i = 0; i < level.info->PrecacheSounds.Size(); ++i)
+		for (auto snd : level.info->PrecacheSounds)
 		{
-			level.info->PrecacheSounds[i].MarkUsed();
+			FSoundID(snd).MarkUsed();
 		}
 		// Don't unload sounds that are playing right now.
 		for (FSoundChan *chan = Channels; chan != NULL; chan = chan->NextChan)