diff --git a/pkgs/development/libraries/haskell/monad-control/default.nix b/pkgs/development/libraries/haskell/monad-control/default.nix
index aa794357b9f..4b6431f678c 100644
--- a/pkgs/development/libraries/haskell/monad-control/default.nix
+++ b/pkgs/development/libraries/haskell/monad-control/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "monad-control";
-  version = "0.3.2";
-  sha256 = "1gw1g89cjr993kcxjd1lvj94klrb8hsxn0yzyl1gmfk4273z39pa";
+  version = "0.3.2.1";
+  sha256 = "17wfdg3a2kkx1jwh7gfgbyx4351b420krsf8syb8l9xrl9gdz5a3";
   buildDepends = [
     baseUnicodeSymbols transformers transformersBase
   ];