diff --git a/src/post2html b/src/post2html
index 51f6f5a..db7589b 100755
--- a/src/post2html
+++ b/src/post2html
@@ -180,6 +180,7 @@ main()
          --metadata pagetitle:ignoreme \
          --wrap none \
          --highlight-style tango \
+         --mathml \
          -B <( src/mkheader post @__PAGE_TITLE__@ ) \
          -A src/footer.tpl.htm \
          < <( prefmt "$file" ) \