diff --git a/CHANGES.md b/CHANGES.md
index 29c1ca04..30a101cf 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -30,8 +30,11 @@ next
 2.6
 ---
 * Require GHC 8.8.
-* `Sing` has switched from a data family to a type family. This has a number of
-  consequences:
+* `Sing` has switched from a data family to a type family. This
+  [GitHub issue comment](https://github.com/goldfirere/singletons/issues/318#issuecomment-467067257)
+  provides a detailed explanation for the motivation behind this change.
+
+  This has a number of consequences:
   * Names like `SBool`, `SMaybe`, etc. are no longer type synonyms for
     particular instantiations of `Sing` but are instead the names of the
     singleton data types themselves. In other words, previous versions of