diff --git a/stepmania/src/arch/Sound/RageSoundDriver_Generic_Software.h b/stepmania/src/arch/Sound/RageSoundDriver_Generic_Software.h
index 94ce504d6d..97670474e9 100644
--- a/stepmania/src/arch/Sound/RageSoundDriver_Generic_Software.h
+++ b/stepmania/src/arch/Sound/RageSoundDriver_Generic_Software.h
@@ -6,7 +6,6 @@
 #include "RageTimer.h"
 #include "RageUtil_CircularBuffer.h"
 
-class SoundMixBuffer;
 static const int samples_per_block = 512;
 class RageSound_Generic_Software: public RageSoundDriver
 {