diff --git a/qqwry.go b/qqwry.go
index 79a38b8..f1ac920 100644
--- a/qqwry.go
+++ b/qqwry.go
@@ -82,6 +82,7 @@ func QueryIP(queryIp string) (country string, area string, err error) {
 		}
 	}
 	if offset <= 0 {
+		err = errors.New("ip not found")
 		return
 	}
 	posM := offset + 4