diff --git a/hgext/transplant.py b/hgext/transplant.py
--- a/hgext/transplant.py
+++ b/hgext/transplant.py
@@ -594,8 +594,8 @@ def transplant(ui, repo, *revs, **opts):
             os.unlink(bundle)
 
 def revsettransplanted(repo, subset, x):
-    """``transplanted(set)``
-    Transplanted changesets in set.
+    """``transplanted([set])``
+    Transplanted changesets in set, or all transplanted changesets.
     """
     if x:
       s = revset.getset(repo, subset, x)
diff --git a/tests/test-transplant.t b/tests/test-transplant.t
--- a/tests/test-transplant.t
+++ b/tests/test-transplant.t
@@ -66,7 +66,8 @@ test transplanted revset
   6  b2
   7  b3
   $ hg help revsets | grep transplanted
-      "transplanted(set)"
+      "transplanted([set])"
+        Transplanted changesets in set, or all transplanted changesets.
 
   $ hg clone ../t ../prune
   updating to branch default