diff --git a/src/wp-includes/css/wp-pointer.css b/src/wp-includes/css/wp-pointer.css
index 8048847961..09acb8622f 100644
--- a/src/wp-includes/css/wp-pointer.css
+++ b/src/wp-includes/css/wp-pointer.css
@@ -13,7 +13,7 @@
 	padding: 15px 18px 14px 60px;
 	border: 1px solid #3592b6;
 	border-bottom: none;
-	line-height: 1.4em;
+	line-height: 1.4;
 	font-size: 14px;
 	color: #fff;
 	background: #00a0d2;