diff --git a/doc/style.css b/doc/style.css
index d6f0eafac..97b30fbf8 100644
--- a/doc/style.css
+++ b/doc/style.css
@@ -47,7 +47,7 @@
 
 /* Used for required form fields. */
 .fb_required {
-	font-style: bold;
+	font-weight: bold;
 }
 
 /* RSS button. */