diff --git a/lib/supports.js b/lib/supports.js
index 4b53cae3f..ea7d68a56 100644
--- a/lib/supports.js
+++ b/lib/supports.js
@@ -79,8 +79,10 @@ class Supports {
             return rule.nodes;
         }
 
+        const result = { warn: () => null };
+
         const prefixer = this.prefixer().add[rule.first.prop];
-        prefixer && prefixer.process && prefixer.process(rule.first);
+        prefixer && prefixer.process && prefixer.process(rule.first, result);
 
         for (let decl of rule.nodes) {
             for (let value of this.prefixer().values('add', rule.first.prop)) {