diff --git a/trie/iterator.go b/trie/iterator.go
index ca382c0243..3d3191ffba 100644
--- a/trie/iterator.go
+++ b/trie/iterator.go
@@ -838,7 +838,7 @@ func (it *unionIterator) Error() error {
 }
 
 // subTreeIterator wraps nodeIterator to traverse a trie within a predefined
-// start and limit range, with optional prefix mode.
+// start and limit range.
 type subtreeIterator struct {
 	NodeIterator