diff --git a/pkgs/development/ocaml-modules/llvm/default.nix b/pkgs/development/ocaml-modules/llvm/default.nix
index b06760a6e009..3bced92cc3e3 100644
--- a/pkgs/development/ocaml-modules/llvm/default.nix
+++ b/pkgs/development/ocaml-modules/llvm/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation {
 
   patches = [ (fetchpatch {
     url = https://raw.githubusercontent.com/ocaml/opam-repository/master/packages/llvm/llvm.3.9/files/cmake.patch;
-    sha256 = "0vjap0xifgm59rwhjc48wi7jpbbif4dllsy4xs45sg95qq5qanp6";
+    sha256 = "1fcc6ylfiw1npdhx7mrsj7h0dx7cym7i9664kpr76zqazb52ikm9";
   })];
 
   cmakeFlags = [ "-DLLVM_OCAML_OUT_OF_TREE=TRUE" ];