diff --git a/aegisub/src/audio_player_portaudio.h b/aegisub/src/audio_player_portaudio.h
index 8f9409602..85d01cc00 100644
--- a/aegisub/src/audio_player_portaudio.h
+++ b/aegisub/src/audio_player_portaudio.h
@@ -60,7 +60,7 @@ private:
 	float volume;
 
 	/// @brief Stream playback position info.
-	typedef struct PositionInfo {
+	struct PositionInfo {
 		volatile int64_t current;	/// Current position.
 		volatile int64_t start;		/// Start position.
 		volatile int64_t end;		/// End position.