diff --git a/Formula/libvoikko.rb b/Formula/libvoikko.rb
index ee25b73482..e87a9c3686 100644
--- a/Formula/libvoikko.rb
+++ b/Formula/libvoikko.rb
@@ -1,8 +1,15 @@
 class Libvoikko < Formula
   desc "Linguistic software and and Finnish dictionary"
   homepage "http://voikko.puimula.org/"
-  url "http://www.puimula.org/voikko-sources/libvoikko/libvoikko-4.0.1.tar.gz"
-  sha256 "4fdc12dec38c0e074f0728652b8bc52595e3d63b2c8c87e8a05cd55b808d32a1"
+  url "http://www.puimula.org/voikko-sources/libvoikko/libvoikko-4.0.2.tar.gz"
+  sha256 "0bfaaabd039024920713020671daff828434fcf4c89bce4601b94a377567f2a3"
+
+  # Standard compatibility fixes for Clang, upstream pull request at
+  # https://github.com/voikko/corevoikko/pull/22
+  patch :p2 do
+    url "https://github.com/voikko/corevoikko/commit/f69bab4.diff"
+    sha256 "415fc284feccb3b55972177d73d32a445a4c9b790071637d8d64da9c86ab2928"
+  end
 
   bottle do
     cellar :any