diff --git a/TombEditor/EditorActions.cs b/TombEditor/EditorActions.cs
index a595f46c8..da03459d3 100644
--- a/TombEditor/EditorActions.cs
+++ b/TombEditor/EditorActions.cs
@@ -5902,6 +5902,9 @@ public static void AssignSoundSourcesSounds(LevelSettings settings)
                         if (instance is SoundSourceInstance)
                         {
                             var soundSource = instance as SoundSourceInstance;
+                            if (soundSource.IsEmpty)
+                                continue;
+
                             if (!settings.SelectedSounds.Contains(soundSource.SoundId))
                                 settings.SelectedSounds.Add(soundSource.SoundId);
                         }