diff --git a/codegen/directive_build.go b/codegen/directive_build.go
index fcc8bdb0bfc..3282884112f 100644
--- a/codegen/directive_build.go
+++ b/codegen/directive_build.go
@@ -1,6 +1,10 @@
 package codegen
 
-import "github.com/pkg/errors"
+import (
+	"sort"
+
+	"github.com/pkg/errors"
+)
 
 func (cfg *Config) buildDirectives(types NamedTypes) ([]*Directive, error) {
 	var directives []*Directive
@@ -38,5 +42,8 @@ func (cfg *Config) buildDirectives(types NamedTypes) ([]*Directive, error) {
 			Args: args,
 		})
 	}
+
+	sort.Slice(directives, func(i, j int) bool { return directives[i].Name < directives[j].Name })
+
 	return directives, nil
 }