diff --git a/lib/LaTeXML/resources/CSS/LaTeXML.css b/lib/LaTeXML/resources/CSS/LaTeXML.css
index 23bf69a97..fea09e1d4 100644
--- a/lib/LaTeXML/resources/CSS/LaTeXML.css
+++ b/lib/LaTeXML/resources/CSS/LaTeXML.css
@@ -377,6 +377,8 @@ span.ltx_rowspan { position:absolute; top:0; bottom:0; }
 .ltx_framed_leftright { border-left-style:solid; border-left-width:1px;
                         border-right-style:solid; border-right-width:1px; }
 
+.ltx_rule { vertical-align: bottom; height: 0.4pt; width: 0.4pt; }
+
 /*======================================================================
  Misc */
 /* .ltx_verbatim*/