diff --git a/src/audio.cpp b/src/audio.cpp
index 04364ec..ead1e6a 100644
--- a/src/audio.cpp
+++ b/src/audio.cpp
@@ -366,6 +366,7 @@ struct SDLSoundSource : ALDataSource
 
 	~SDLSoundSource()
 	{
+		/* This also closes 'srcOps' */
 		Sound_FreeSample(sample);
 	}