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-rw-r--r--libs/gtkmm2ext/idle_adjustment.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/libs/gtkmm2ext/idle_adjustment.cc b/libs/gtkmm2ext/idle_adjustment.cc
index f74a3a9701..edf5517fff 100644
--- a/libs/gtkmm2ext/idle_adjustment.cc
+++ b/libs/gtkmm2ext/idle_adjustment.cc
@@ -20,6 +20,7 @@
#define _BSD_SOURCE
#include <gtkmm2ext/idle_adjustment.h>
#include <gtkmm/main.h>
+#include <glibmm/main.h>
#include <iostream>
#include "pbd/timersub.h"