diff --git a/engine/client/s_mix.c b/engine/client/s_mix.c
index 78bef1db..f79f7aee 100644
--- a/engine/client/s_mix.c
+++ b/engine/client/s_mix.c
@@ -988,6 +988,7 @@ void MIX_UpsampleAllPaintbuffers( int end, int count )
 	// mix 11khz sounds:
 	MIX_MixChannelsToPaintbuffer( end, SOUND_11k, SOUND_11k );
 
+#if SOUND_DMA_SPEED >= SOUND_22k
 	// upsample all 11khz buffers by 2x
 	// only upsample roombuffer if dsp fx are on KDB: perf
 	MIX_SetCurrentPaintbuffer( IROOMBUFFER ); // operates on MixUpSample
@@ -995,7 +996,9 @@ void MIX_UpsampleAllPaintbuffers( int end, int count )
 
 	// mix 22khz sounds:
 	MIX_MixChannelsToPaintbuffer( end, SOUND_22k, SOUND_22k );
+#endif
 
+#if SOUND_DMA_SPEED >= SOUND_44k
 	// upsample all 22khz buffers by 2x
 	// only upsample roombuffer if dsp fx are on KDB: perf
 	MIX_SetCurrentPaintbuffer( IROOMBUFFER );
@@ -1003,6 +1006,7 @@ void MIX_UpsampleAllPaintbuffers( int end, int count )
 
 	// mix all 44khz sounds to all active paintbuffers
 	MIX_MixChannelsToPaintbuffer( end, SOUND_44k, SOUND_DMA_SPEED );
+#endif
 
 	// mix raw samples from the video streams
 	MIX_SetCurrentPaintbuffer( IROOMBUFFER );