diff --git a/libs/ardour/session_handle.cc b/libs/ardour/session_handle.cc
index 7777e3aaa0..94f4f3f496 100644
--- a/libs/ardour/session_handle.cc
+++ b/libs/ardour/session_handle.cc
@@ -19,15 +19,15 @@
 #include "pbd/demangle.h"
 #include "pbd/error.h"
 
+#include "ardour/boost_debug.h"
+#include "ardour/session.h"
+#include "ardour/session_handle.h"
+
 #ifdef TRACE_SETSESSION_NULL
 #include <cassert>
 #include "pbd/stacktrace.h"
 #endif
 
-#include "ardour/boost_debug.h"
-#include "ardour/session.h"
-#include "ardour/session_handle.h"
-
 #include "pbd/i18n.h"
 
 using namespace std;