diff --git a/src/calibre/gui2/tag_view.py b/src/calibre/gui2/tag_view.py
index 846ee064cd..5e9a5c7b49 100644
--- a/src/calibre/gui2/tag_view.py
+++ b/src/calibre/gui2/tag_view.py
@@ -949,9 +949,10 @@ class TagsModel(QAbstractItemModel): # {{{
         Search for an item (a node) in the tags browser list that matches both
         the key (exact case-insensitive match) and txt (contains case-
         insensitive match). Returns the path to the node. Note that paths are to
-        a location (second item, fourth item, 25 item), not to a node. If the
-        tree is changed subsequent to calling this method, the path can easily
-        refer to a different node or no node at all.
+        a location (second item, fourth item, 25 item), not to a node. If
+        start_path is None, the search starts with the topmost node. If the tree
+        is changed subsequent to calling this method, the path can easily refer
+        to a different node or no node at all.
         '''
         if not txt:
             return None