diff --git a/aegisub/src/audio_renderer.cpp b/aegisub/src/audio_renderer.cpp
index 08b7f760a..ff7c2c78f 100644
--- a/aegisub/src/audio_renderer.cpp
+++ b/aegisub/src/audio_renderer.cpp
@@ -36,7 +36,7 @@
 
 #include "audio_renderer.h"
 #include <wx/bitmap.h>
-#include <set>
+#include <map>
 
 
 /// @class AudioRendererBitmapCache