diff --git a/syndicate/mc/preserve.css b/syndicate/mc/preserve.css
index 242bd2a..877ee83 100644
--- a/syndicate/mc/preserve.css
+++ b/syndicate/mc/preserve.css
@@ -22,7 +22,7 @@ pre { padding: 0.33rem; }
 body {
   counter-reset: section 0 subsection 0;
 }
-h2::before, h3::before {
+h2:before, h3:before {
     text-align: right;
     display: inline-block;
     position: relative;
@@ -33,14 +33,14 @@ h2::before, h3::before {
     margin-right: -2em;
     height: 0;
 }
-h2::before {
+h2:before {
     counter-increment: section;
     content: counter(section) ". ";
 }
 h2 {
     counter-reset: subsection 0;
 }
-h3::before {
+h3:before {
     counter-increment: subsection;
     content: counter(section) "." counter(subsection) ". ";
 }