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-rw-r--r--src/client/view/selection.js1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/client/view/selection.js b/src/client/view/selection.js
index 95d5f9dd..974e1586 100644
--- a/src/client/view/selection.js
+++ b/src/client/view/selection.js
@@ -239,6 +239,7 @@ var setup_merge_button = function(main_graph)
link_fan_btn.asEventStream('click').onValue(link_fan_root_selection);
selectionChangedBus.map(function (selection) { return selection.root_nodes.length > 1; })
+ .skipDuplicates()
.onValue(function (visible) {
if (visible) {
list_call(buttons, 'show');