diff --git a/doc/walker.go b/doc/walker.go
index a3ccc3b0d..4b9efa713 100644
--- a/doc/walker.go
+++ b/doc/walker.go
@@ -117,12 +117,8 @@ func (w *walker) build(srcs []*source, nod *Node) ([]string, error) {
 	if err != nil {
 		if nogo {
 			err = nil
-		} else if strings.Contains(err.Error(), "expected 'package'") {
-			log.Warn("walker: %s", err.Error())
-			return nil, nil
 		} else {
-			log.Error("walker", "Error occurs when check imports:")
-			log.Error("", "\t"+err.Error())
+			log.Warn("walker: %s", err.Error())
 			return nil, nil
 		}
 	}