diff --git a/res/welcome.html b/res/welcome.html
index 67a6a0ae7f..e9f1514a10 100644
--- a/res/welcome.html
+++ b/res/welcome.html
@@ -158,14 +158,14 @@ we don't have an account and should hide them. No account == no guest account ei
     display: none;
 }
 
-@media only screen and (max-width : 480px) {
-  .mx_ButtonRow {
-    flex-direction: column;
-  }
+@media only screen and (max-width: 480px) {
+    .mx_ButtonRow {
+        flex-direction: column;
+    }
 
-  .mx_ButtonRow > * {
-      margin: 0 0 10px 0;
-  }
+    .mx_ButtonRow > * {
+        margin: 0 0 10px 0;
+    }
 }
 
 </style>