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-rw-r--r--gtk2_ardour/automation_time_axis.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/automation_time_axis.cc b/gtk2_ardour/automation_time_axis.cc
index 8e0445c4eb..eaed1e5199 100644
--- a/gtk2_ardour/automation_time_axis.cc
+++ b/gtk2_ardour/automation_time_axis.cc
@@ -23,6 +23,7 @@
#include "ardour/automation_control.h"
#include "ardour/event_type_map.h"
#include "ardour/route.h"
+#include "ardour/session.h"
#include "ardour_ui.h"
#include "automation_time_axis.h"