diff --git a/resources/compiled_coffeescript.zip b/resources/compiled_coffeescript.zip
index fefc756553..40c276e6be 100644
Binary files a/resources/compiled_coffeescript.zip and b/resources/compiled_coffeescript.zip differ
diff --git a/src/calibre/ebooks/oeb/display/mathjax.coffee b/src/calibre/ebooks/oeb/display/mathjax.coffee
index 78cb80aee4..d7cdf2ea00 100644
--- a/src/calibre/ebooks/oeb/display/mathjax.coffee
+++ b/src/calibre/ebooks/oeb/display/mathjax.coffee
@@ -32,7 +32,9 @@ class MathJax
         scale = if is_windows then 160 else 100
 
         script.type = 'text/javascript'
-        script.src = this.base + 'MathJax.js'
+        script.onerror = (ev) ->
+            console.log('Failed to load MathJax script: ' + ev.targt.src)
+        script.src = this.base + '/MathJax.js'
         script.text = user_config + ('''
         MathJax.Hub.signal.Interest(function (message) {if (String(message).match(/error/i)) {console.log(message)}});
         MathJax.Hub.Config({