diff --git a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
index eebc80a44ea..fe3207ada24 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-7.10.x.nix
@@ -145,8 +145,8 @@ self: super: {
     version = "0.1.0.0";
     src = fetchgit {
       url = git://github.com/ghcjs/ghcjs-prim.git;
-      rev = "ca08e46257dc276e01d08fb47a693024bae001fa"; # ghc-7.10 branch
-      sha256 = "0w7sqzp5p70yhmdhqasgkqbf3b61wb24djlavwil2j8ry9y472w3";
+      rev = "dfeaab2aafdfefe46bf12960d069f28d2e5f1454"; # ghc-7.10 branch
+      sha256 = "19kyb26nv1hdpp0kc2gaxkq5drw5ib4za0641py5i4bbf1g58yvy";
     };
     buildDepends = [ primitive ];
     license = pkgs.stdenv.lib.licenses.bsd3;