diff --git a/pkgs/development/libraries/haskell/mtl/2.1.3.1.nix b/pkgs/development/libraries/haskell/mtl/2.1.3.1.nix
new file mode 100644
index 00000000000..e9fa49510c1
--- /dev/null
+++ b/pkgs/development/libraries/haskell/mtl/2.1.3.1.nix
@@ -0,0 +1,15 @@
+{ cabal, transformers }:
+
+cabal.mkDerivation (self: {
+  pname = "mtl";
+  version = "2.1.3.1";
+  sha256 = "1xpn2wjmqbh2cg1yssc6749xpgcqlrrg4iilwqgkcjgvaxlpdbvp";
+  buildDepends = [ transformers ];
+  meta = {
+    homepage = "http://github.com/ekmett/mtl";
+    description = "Monad classes, using functional dependencies";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = [ self.stdenv.lib.maintainers.andres ];
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 2b8ab42e2f1..2991862969b 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -153,7 +153,7 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
     html         = self.html_1_0_1_2;
     HTTP         = self.HTTP_4000_2_11;
     HUnit        = self.HUnit_1_2_5_2;
-    mtl          = self.mtl_2_1_2;
+    mtl          = self.mtl_2_1_3_1;
     network      = self.network_2_4_2_2;
     OpenGL       = self.OpenGL_2_9_1_0;
     OpenGLRaw    = self.OpenGLRaw_1_4_0_0;
@@ -1761,7 +1761,10 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
   mtl_2_1_2 = callPackage ../development/libraries/haskell/mtl/2.1.2.nix {
     transformers = self.transformers_0_3_0_0;
   };
-  mtl = self.mtl_2_1_2;
+  mtl_2_1_3_1 = callPackage ../development/libraries/haskell/mtl/2.1.3.1.nix {
+    transformers = self.transformers_0_3_0_0;
+  };
+  mtl = self.mtl_2_1_3_1;
 
   mtlparse = callPackage ../development/libraries/haskell/mtlparse {};