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-rw-r--r--libs/pbd/pbd/ui_callback.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libs/pbd/pbd/ui_callback.h b/libs/pbd/pbd/ui_callback.h
index 878f6e4fd0..8574de0dec 100644
--- a/libs/pbd/pbd/ui_callback.h
+++ b/libs/pbd/pbd/ui_callback.h
@@ -21,6 +21,7 @@
#define __pbd_ui_callback_h__
#include <boost/function.hpp>
+#include <boost/bind.hpp> /* we don't need this here, but anything calling call_slot() probably will, so this is convenient */
#include <glibmm/thread.h>
namespace PBD