diff --git a/Troubleshooting.md b/Troubleshooting.md
index b669403..baf08d7 100644
--- a/Troubleshooting.md
+++ b/Troubleshooting.md
@@ -43,7 +43,7 @@ Please check that you are not using [protocol relative urls](http://www.pauliris
 #### I'm hosting fonts on my server and icons don't show up
 Check the following:
 
-1. You properly configured server's [MIME types](https://github.com/EnlightenAgency/Server-Setup-MIME-Types-Headers/blob/master/font-mimetypes.txt);
+1. You properly configured server's [MIME types](https://github.com/EnlightenAgency/Server-Setup-MIME-Types-Headers/blob/master/font-mimetypes.txt) (Ref: [#5559](https://github.com/FortAwesome/Font-Awesome/issues/5559#issuecomment-106956250));
 2. You properly configured [Cross-origin Resource Sharing (CORS)](https://github.com/FortAwesome/Font-Awesome/issues/4675#issuecomment-58192275);
 3. **For Internet Explorer**: you don't serve files with `no-store` option in Cache-control header (Ref: [#6454](https://github.com/FortAwesome/Font-Awesome/issues/6454));
 4. **For Internet Explorer and HTTPS**: you don't serve files with `no-cache` option in Pragma header.