diff --git a/alex.cabal b/alex.cabal
--- a/alex.cabal
+++ b/alex.cabal
@@ -1,5 +1,5 @@
 name: alex
-version: 3.1.5
+version: 3.1.6
 license: BSD3
 license-file: LICENSE
 copyright: (c) Chis Dornan, Simon Marlow
@@ -15,6 +15,11 @@
   expressions and generates a Haskell module containing code
   for scanning text efficiently. It is similar to the tool
   lex or flex for C/C++.
+  .
+  Changes in 3.1.6:
+  .
+  * sdist for 3.1.5 was mis-generated, causing it to ask for Happy
+    when building.
   .
   Changes in 3.1.5:
   .