diff --git a/OpenRA.Game/Sound.cs b/OpenRA.Game/Sound.cs
index 7fcf201ca7..297d886e21 100644
--- a/OpenRA.Game/Sound.cs
+++ b/OpenRA.Game/Sound.cs
@@ -138,6 +138,7 @@ namespace OpenRA
 
 			var mi = voicedUnit.Info.Traits.GetOrDefault<SelectableInfo>();
 			if (mi == null) return;
+			if (mi.Voice == null) return;
 
 			var vi = Rules.Voices[mi.Voice.ToLowerInvariant()];