diff --git a/src/event/Loop.hxx b/src/event/Loop.hxx
index 9bd37db08..baaac05af 100644
--- a/src/event/Loop.hxx
+++ b/src/event/Loop.hxx
@@ -38,7 +38,6 @@
 #include "thread/Mutex.hxx"
 #endif
 
-#include <atomic>
 #include <cassert>
 
 #include "io/uring/Features.h"