diff --git a/src/core/audio/AudioSndio.cpp b/src/core/audio/AudioSndio.cpp
index 1e4e1281e..94ed34690 100644
--- a/src/core/audio/AudioSndio.cpp
+++ b/src/core/audio/AudioSndio.cpp
@@ -12,6 +12,7 @@
 
 #include "endian_handling.h"
 #include "LcdSpinBox.h"
+#include "Mixer.h"
 #include "Engine.h"
 #include "gui_templates.h"
 #include "templates.h"