From 8a434596280ea01e5f8aa461d10318c6b702ab75 Mon Sep 17 00:00:00 2001
From: Artur Arseniev <artur.catch@hotmail.it>
Date: Mon, 29 Oct 2018 13:36:44 +0100
Subject: [PATCH] Fix duplicated CSS rules with at-rules. Closes #1513

---
 src/css_composer/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/css_composer/index.js b/src/css_composer/index.js
index 59daaee49..44eba860f 100644
--- a/src/css_composer/index.js
+++ b/src/css_composer/index.js
@@ -203,7 +203,7 @@ module.exports = () => {
       // do not create rules that were found before
       // unless this is an at-rule, for which multiple declarations
       // make sense (e.g. multiple `@font-type`s)
-      if (rule && rule.config && !rule.config.atRuleType) {
+      if (rule && rule.config && !rule.config.singleAtRule) {
         return rule;
       } else {
         opt.state = s;