diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index 81c399d2a2..1389d1ac16 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -69,7 +69,6 @@
 #include "pbd/controllable_descriptor.h"
 #include "pbd/enumwriter.h"
 #include "pbd/error.h"
-#include "pbd/filesystem.h"
 #include "pbd/file_utils.h"
 #include "pbd/pathscanner.h"
 #include "pbd/pthread_utils.h"