diff --git a/src/services/keyboard_actions.js b/src/services/keyboard_actions.js
index c32881815..2bac4be6f 100644
--- a/src/services/keyboard_actions.js
+++ b/src/services/keyboard_actions.js
@@ -184,6 +184,12 @@ const DEFAULT_KEYBOARD_ACTIONS = [
         description: "Add note above to the selection",
         scope: "note-tree"
     },
+    {
+        actionName: "duplicateSubtree",
+        defaultShortcuts: [],
+        description: "Duplicate subtree",
+        scope: "note-tree"
+    },
 
 
     {
diff --git a/src/services/notes.js b/src/services/notes.js
index 3f4eddf56..4aa944504 100644
--- a/src/services/notes.js
+++ b/src/services/notes.js
@@ -739,7 +739,10 @@ function duplicateSubtree(origNoteId, newParentNoteId) {
 
     const res = duplicateSubtreeInner(origNote, origBranch, newParentNoteId, noteIdMapping);
 
-    res.note.title += " (dup)";
+    if (!res.note.title.endsWith('(dup)')) {
+        res.note.title += " (dup)";
+    }
+
     res.note.save();
 
     return res;