diff --git a/stepmania/src/arch/Sound/RageSoundDriver_ALSA9.h b/stepmania/src/arch/Sound/RageSoundDriver_ALSA9.h
index 0cf97ed62c..4a8b046eb2 100644
--- a/stepmania/src/arch/Sound/RageSoundDriver_ALSA9.h
+++ b/stepmania/src/arch/Sound/RageSoundDriver_ALSA9.h
@@ -13,6 +13,7 @@
  */
 
 #include "RageSound.h"
+#include "RageSoundDriver.h"
 
 #define ALSA_PCM_NEW_HW_PARAMS_API
 #include <alsa/asoundlib.h>