diff --git a/libs/ardour/ardour/graph.h b/libs/ardour/ardour/graph.h
index b735d69888..e5c03ad134 100644
--- a/libs/ardour/ardour/graph.h
+++ b/libs/ardour/ardour/graph.h
@@ -28,7 +28,7 @@
 
 #include <boost/shared_ptr.hpp>
 
-#include <glib/gatomic.h>
+#include <glib.h>
 #include <cassert>
 
 #include <pthread.h>