diff --git a/src/event/Loop.cxx b/src/event/Loop.cxx
index be0f1804b..1d5d1d47d 100644
--- a/src/event/Loop.cxx
+++ b/src/event/Loop.cxx
@@ -20,7 +20,6 @@
 #include "Loop.hxx"
 #include "DeferEvent.hxx"
 #include "SocketEvent.hxx"
-#include "IdleEvent.hxx"
 #include "util/ScopeExit.hxx"
 
 #ifdef HAVE_THREADED_EVENT_LOOP