diff --git a/module/replace.go b/module/replace.go
index eba53bb..c4afdb3 100644
--- a/module/replace.go
+++ b/module/replace.go
@@ -3,6 +3,7 @@ package module
 import (
 	"go/ast"
 	"go/token"
+	"sort"
 	"strings"
 
 	"github.com/fatih/structtag"
@@ -98,6 +99,7 @@ func (v retag) Visit(n ast.Node) ast.Visitor {
 		for _, t := range newTags.Tags() {
 			oldTags.Set(t)
 		}
+		sort.Stable(oldTags)
 
 		f.Tag.Value = "`" + oldTags.String() + "`"
 
diff --git a/module/tagger.go b/module/tagger.go
index 4e38d2b..41ed28e 100644
--- a/module/tagger.go
+++ b/module/tagger.go
@@ -32,7 +32,6 @@ func (mod) Name() string {
 }
 
 func (m mod) Execute(targets map[string]pgs.File, packages map[string]pgs.Package) []pgs.Artifact {
-
 	xtv := m.Parameters().Str("xxx")
 
 	xtv = strings.Replace(xtv, "+", ":", -1)