diff --git a/src/audio/mixer.hpp b/src/audio/mixer.hpp
index e9f1ab80d..369cc15ba 100644
--- a/src/audio/mixer.hpp
+++ b/src/audio/mixer.hpp
@@ -2,6 +2,7 @@
 
 #include "Stream.hpp"
 
+#include <atomic>
 #include <memory>
 #include <vector>