diff --git a/pkgs/development/compilers/ocaml/4.12.nix b/pkgs/development/compilers/ocaml/4.12.nix
index 0662e66e0b6a..4be2bcf5f9d0 100644
--- a/pkgs/development/compilers/ocaml/4.12.nix
+++ b/pkgs/development/compilers/ocaml/4.12.nix
@@ -1,6 +1,6 @@
 import ./generic.nix {
   major_version = "4";
   minor_version = "12";
-  patch_version = "0";
-  sha256 = "1hxy349jfa2vkfgmxf6pvd9w4z5bmcgsg0fxfdabcghyvjw9vvir";
+  patch_version = "1";
+  sha256 = "1jbjjnmqq6ymsy81x188i256bz4z5jrz1pws8g1qf59c32ganjkf";
 }