diff --git a/master/styling.html b/master/styling.html
index a0411acb..bd7bc182 100644
--- a/master/styling.html
+++ b/master/styling.html
@@ -445,7 +445,6 @@ <h2 id="PresentationAttributes">Presentation attributes</h2>
       <a>'font-style'</a>,
       <a>'font-variant'</a>,
       <a>'font-weight'</a>,
-      <a>'glyph-orientation-horizontal'</a>,
       <a>'glyph-orientation-vertical'</a>,
       <a>'image-rendering'</a>,
       <a>'letter-spacing'</a>,