diff --git a/cps/templates/readpdf.html b/cps/templates/readpdf.html
index 4b039d20..48b3091c 100644
--- a/cps/templates/readpdf.html
+++ b/cps/templates/readpdf.html
@@ -26,7 +26,7 @@ See https://github.com/adobe-type-tools/cmap-resources
     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
     <meta name="google" content="notranslate">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
-    <title>{{_(PDF.js viewer)}}</title>
+    <title>{{_('PDF.js viewer')}}</title>
 
 
     <link rel="stylesheet" href="{{ url_for('static', filename='css/viewer.css') }}">