diff --git a/colors/highlite.vim b/colors/highlite.vim
index 9949b18..a1fe16f 100644
--- a/colors/highlite.vim
+++ b/colors/highlite.vim
@@ -494,7 +494,7 @@ local highlight_groups = {
 	mkdItalic           = 'mkdBold',
 	mkdListItem         = 'Special',
 	mkdNonListItemBlock = 'Normal',
-	mkdRule             = 'Underline',
+	mkdRule             = 'Underlined',
 	texMathZoneY        = 'String',
 
 	--[[ 4.3.20. Python ]]