diff --git a/radicale/web/internal_data/index.html b/radicale/web/internal_data/index.html
index 8fb6c21..ea783a4 100644
--- a/radicale/web/internal_data/index.html
+++ b/radicale/web/internal_data/index.html
@@ -2,7 +2,7 @@
 <html lang="en">
 
 <meta charset="utf-8">
-<meta name="viewport" content="width=device-width initial-scale=1">
+<meta name="viewport" content="width=device-width, initial-scale=1">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <script src="fn.js"></script>
 <title>Web interface for Radicale</title>
