diff --git a/UI.hpp b/UI.hpp
index 7a32daf..fb0a300 100644
--- a/UI.hpp
+++ b/UI.hpp
@@ -30,6 +30,7 @@
 #include "disp_plus.h"
 #include "effect_modulated_delay.h"
 #include "effect_stereo_mono.h"
+#include "mixer8.h"
 #ifdef USE_PLATEREVERB
 #include "effect_platervbstereo.h"
 #else
@@ -84,8 +85,8 @@ extern AudioEffectMonoStereo*     mono2stereo[NUM_DEXED];
 extern AudioMixer4                microdexed_peak_mixer;
 extern AudioAnalyzePeak           microdexed_peak;
 #if defined(USE_FX)
-extern AudioMixer4                reverb_mixer_r;
-extern AudioMixer4                reverb_mixer_l;
+extern AudioMixer8                reverb_mixer_r;
+extern AudioMixer8                reverb_mixer_l;
 #ifdef USE_PLATEREVERB
 extern AudioEffectPlateReverb     reverb;
 #else