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-rw-r--r--gtk2_ardour/selection.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk2_ardour/selection.h b/gtk2_ardour/selection.h
index a1b1ae0da3..c4336fba21 100644
--- a/gtk2_ardour/selection.h
+++ b/gtk2_ardour/selection.h
@@ -56,6 +56,7 @@ class Selection : public sigc::trackable
enum Operation {
Set,
+ Add,
Toggle,
Extend
};