diff --git a/css/landing.css b/css/landing.css
index 559b9b64..5cef2e57 100644
--- a/css/landing.css
+++ b/css/landing.css
@@ -853,7 +853,7 @@ button[type="submit"]:hover {
   border-top-left-radius: 1em;
   border-top-right-radius: 1em;
   pointer-events: none;
-  --webkit-mask-image: linear-gradient(#5315ff,#0000);
+  -webkit-mask-image: linear-gradient(#5315ff,#0000);
 }
 .landing-actions a {
   background: #fff;