1 files changed, 1 insertions, 0 deletions
diff --git a/tmux.h b/tmux.h
index fb2fb940..68790a05 100644
--- a/tmux.h
+++ b/tmux.h
@@ -537,6 +537,7 @@ enum mode_key_cmd {
 	MODEKEYCHOICE_UP,
 
 	/* Copy keys. */
+	MODEKEYCOPY_APPENDSELECTION,
 	MODEKEYCOPY_BACKTOINDENTATION,
 	MODEKEYCOPY_BOTTOMLINE,
 	MODEKEYCOPY_CANCEL,