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-rw-r--r--gtk2_ardour/gain_meter.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/gain_meter.h b/gtk2_ardour/gain_meter.h
index a24b93c034..b12f7eb31b 100644
--- a/gtk2_ardour/gain_meter.h
+++ b/gtk2_ardour/gain_meter.h
@@ -30,6 +30,7 @@
#include <gtkmm/button.h>
#include <gtkmm/table.h>
#include <gtkmm/drawingarea.h>
+#include <gdkmm/colormap.h>
#include <ardour/types.h>