--- a/layout/style/ServoArcTypeList.h
+++ b/layout/style/ServoArcTypeList.h
@@ -1,24 +1,24 @@
 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /* a list of all Servo Arc types used in stylo bindings for preprocessing */
 
+SERVO_ARC_TYPE(AnimationValue, RawServoAnimationValue)
 SERVO_ARC_TYPE(CssRules, ServoCssRules)
-SERVO_ARC_TYPE(StyleSheetContents, RawServoStyleSheetContents)
 SERVO_ARC_TYPE(DeclarationBlock, RawServoDeclarationBlock)
-SERVO_ARC_TYPE(StyleRule, RawServoStyleRule)
+SERVO_ARC_TYPE(DocumentRule, RawServoDocumentRule)
+SERVO_ARC_TYPE(FontFeatureValuesRule, RawServoFontFeatureValuesRule)
 SERVO_ARC_TYPE(ImportRule, RawServoImportRule)
-SERVO_ARC_TYPE(AnimationValue, RawServoAnimationValue)
 SERVO_ARC_TYPE(Keyframe, RawServoKeyframe)
 SERVO_ARC_TYPE(KeyframesRule, RawServoKeyframesRule)
 SERVO_ARC_TYPE(MediaList, RawServoMediaList)
 SERVO_ARC_TYPE(MediaRule, RawServoMediaRule)
 SERVO_ARC_TYPE(NamespaceRule, RawServoNamespaceRule)
 SERVO_ARC_TYPE(PageRule, RawServoPageRule)
+SERVO_ARC_TYPE(RuleNode, RawServoRuleNode)
 SERVO_ARC_TYPE(SupportsRule, RawServoSupportsRule)
-SERVO_ARC_TYPE(DocumentRule, RawServoDocumentRule)
-SERVO_ARC_TYPE(FontFeatureValuesRule, RawServoFontFeatureValuesRule)
-SERVO_ARC_TYPE(RuleNode, RawServoRuleNode)
+SERVO_ARC_TYPE(StyleRule, RawServoStyleRule)
+SERVO_ARC_TYPE(StyleSheetContents, RawServoStyleSheetContents)