diff --git a/states/statemgr/filesystem.go b/states/statemgr/filesystem.go
index 8338e5741..541108dde 100644
--- a/states/statemgr/filesystem.go
+++ b/states/statemgr/filesystem.go
@@ -336,7 +336,7 @@ func (s *Filesystem) Unlock(id string) error {
 		idErr := fmt.Errorf("invalid lock id: %q. current id: %q", id, s.lockID)
 		info, err := s.lockInfo()
 		if err != nil {
-			err = multierror.Append(idErr, err)
+			idErr = multierror.Append(idErr, err)
 		}
 
 		return &LockError{