X?

diff --git a/hack-a-day-rules.md b/hack-a-day-rules.md
index 6ba81a60e750a49626e6ee37fabc4a3563bdef7e..1c5111ded606ffd36c6b3810b9c25331f7d08f19 100644 (file)
--- a/hack-a-day-rules.md
+++ b/hack-a-day-rules.md
@@ -10,7 +10,7 @@ a.fail::before {
     line-height: 100%;
 }
 
-a::fail {
+a.fail {
     display: block;
     margin-left: auto;
     margin-right: auto;