diff --git a/lib/inspec/resources/postfix_conf.rb b/lib/inspec/resources/postfix_conf.rb
index 99cec2882..625a3e039 100644
--- a/lib/inspec/resources/postfix_conf.rb
+++ b/lib/inspec/resources/postfix_conf.rb
@@ -4,7 +4,7 @@ require "inspec/utils/simpleconfig"
 module Inspec::Resources
   class PostfixConf < IniConfig
     name "postfix_conf"
-    supports platform: "linux"
+    supports platform: "unix"
     desc "Use the postfix_conf Inspec audit resource to test the configuration of the Postfix Mail Transfer Agent"
 
     # Allow user to specify a custom configuration path, use default Postfix configuration path if no custom path is provided