diff --git a/doc.md b/doc.md
index d6be6c44..119116ae 100644
--- a/doc.md
+++ b/doc.md
@@ -120,7 +120,7 @@ Configuration Guides
  *  [Rxvt Guide](/doc/rxvt/)
  *  [Managing VM kernel](/doc/managing-vm-kernel/)
  *  [Salt management stack](/doc/salt/)
-
+ *  [Adding SSD storage cache](https://groups.google.com/d/msgid/qubes-users/a08359c9-9eb0-4d1a-ad92-a8a9bc676ea6%40googlegroups.com)
 
 Customization Guides
 --------------------