diff --git a/pkg/core/stateroot/module.go b/pkg/core/stateroot/module.go
index 34503d7eb..751e75d1b 100644
--- a/pkg/core/stateroot/module.go
+++ b/pkg/core/stateroot/module.go
@@ -80,11 +80,13 @@ func (s *Module) GetState(root util.Uint256, key []byte) ([]byte, error) {
 	return tr.Get(key)
 }
 
-// FindStates returns set of key-value pairs with key matching the prefix starting
-// from the `prefix`+`start` path from MPT trie with the specified root. `max` is
-// the maximum number of elements to be returned. If nil `start` specified, then
-// item with key equals to prefix is included into result; if empty `start` specified,
-// then item with key equals to prefix is not included into result.
+// FindStates returns a set of key-value pairs with keys matching the prefix starting
+// from the `prefix`+`start` path from MPT with the specified root. `max` is
+// the maximum number of elements to be returned. If nil `start` is specified, then the
+// item with the key equal to the prefix is included into the result; if empty `start` is specified,
+// then the item with the key equal to the prefix is not included into the result.
+// In case there are no results (prefix is unused, start is after the last available
+// element) mpt.ErrNotFound is returned.
 func (s *Module) FindStates(root util.Uint256, prefix, start []byte, max int) ([]storage.KeyValue, error) {
 	// Allow accessing old values, it's RO thing.
 	tr := mpt.NewTrie(mpt.NewHashNode(root), s.mode&^mpt.ModeGCFlag, storage.NewMemCachedStore(s.Store))