diff --git a/components/style/properties.mako.rs b/components/style/properties.mako.rs
index 0dfd232cb4a..7fc7b2ae515 100644
--- a/components/style/properties.mako.rs
+++ b/components/style/properties.mako.rs
@@ -854,8 +854,12 @@ pub mod longhands {
     //     upper-roman
     //
     // [1]: http://dev.w3.org/csswg/css-counter-styles/
-    ${single_keyword("list-style-type",
-                     "disc none circle square decimal arabic-indic bengali cambodian cjk-decimal devanagari gujarati gurmukhi kannada khmer lao malayalam mongolian myanmar oriya persian telugu thai tibetan lower-alpha upper-alpha cjk-earthly-branch cjk-heavenly-stem lower-greek hiragana hiragana-iroha katakana katakana-iroha disclosure-open disclosure-closed")}
+    ${single_keyword("list-style-type", """
+        disc none circle square decimal arabic-indic bengali cambodian cjk-decimal devanagari
+        gujarati gurmukhi kannada khmer lao malayalam mongolian myanmar oriya persian telugu thai
+        tibetan lower-alpha upper-alpha cjk-earthly-branch cjk-heavenly-stem lower-greek hiragana
+        hiragana-iroha katakana katakana-iroha disclosure-open disclosure-closed
+    """)}
 
     <%self:longhand name="list-style-image">
         use std::borrow::IntoCow;