diff --git a/src/mixer/Memento.cxx b/src/mixer/Memento.cxx
index a7d185ebb..5a5fe9d55 100644
--- a/src/mixer/Memento.cxx
+++ b/src/mixer/Memento.cxx
@@ -3,7 +3,6 @@
 
 #include "Memento.hxx"
 #include "output/MultipleOutputs.hxx"
-#include "Idle.hxx"
 #include "util/StringCompare.hxx"
 #include "io/BufferedOutputStream.hxx"