diff --git a/src/filter/plugins/ReplayGainFilterPlugin.cxx b/src/filter/plugins/ReplayGainFilterPlugin.cxx
index 371469e3c..a215e7a14 100644
--- a/src/filter/plugins/ReplayGainFilterPlugin.cxx
+++ b/src/filter/plugins/ReplayGainFilterPlugin.cxx
@@ -12,7 +12,6 @@
 #include "pcm/AudioFormat.hxx"
 #include "pcm/Volume.hxx"
 #include "util/Domain.hxx"
-#include "Idle.hxx"
 #include "Log.hxx"
 
 #include <cassert>