diff --git a/aegisub/libaegisub/common/ffms_audio.cpp b/aegisub/libaegisub/common/ffms_audio.cpp
index b33e260dd..82819963b 100644
--- a/aegisub/libaegisub/common/ffms_audio.cpp
+++ b/aegisub/libaegisub/common/ffms_audio.cpp
@@ -39,7 +39,7 @@ Audio::Audio(std::string filename)
 #ifdef WIN32
 	HRESULT res;
 	res = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
-	if (SUCCEEDED(res)) 
+	if (SUCCEEDED(res))
 		COMInited = true;
 	else if (res != RPC_E_CHANGED_MODE)
 		throw AudioOpenError("COM initialization failure");
@@ -128,7 +128,7 @@ void Audio::LoadAudio(std::string filename) {
 		}
 	}
 	// no valid index exists and the file only has one audio track, index it
-	else if (TrackNumber < 0) 
+	else if (TrackNumber < 0)
 		TrackNumber = FFMS_TRACKMASK_ALL;
 	// else: do nothing (keep track mask as it is)
 
diff --git a/aegisub/libaegisub/common/ffms_audio.h b/aegisub/libaegisub/common/ffms_audio.h
index 111ca1864..800e9b924 100644
--- a/aegisub/libaegisub/common/ffms_audio.h
+++ b/aegisub/libaegisub/common/ffms_audio.h
@@ -31,6 +31,8 @@
 
 namespace ffms {
 
+/// @class Audio
+/// Audio file support.
 class Audio {
     FFMS_AudioSource *AudioSource;  ///< audio source object
     bool COMInited;                 ///< COM initialization state