diff --git a/contrib/html.sh b/contrib/html.sh
index dbb40f6..bd15bf0 100755
--- a/contrib/html.sh
+++ b/contrib/html.sh
@@ -10,5 +10,6 @@ sed \
 	< "${0}.d/head.html"
 markdown -f toc,idanchor "${1}" | sed \
 	-e 's/href="\([-_\./[:alnum:]]*\)\.md\(#[-[:alnum:]]*\)\?"/href="\1.html\2"/g' \
-	-e '/<h[1234] /s| id="\(.*\)">| id="\L\1">|'
+	-e '/<h[1234] /s| id="\(.*\)">| id="\L\1">|' \
+	-e '/<h[1234] /s|-2c-||'
 printf '</body></html>'