diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 238c0e55a5d0..6ac59bb27394 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16425,7 +16425,7 @@ with pkgs;
 
   linuxsampler = callPackage ../applications/audio/linuxsampler { };
 
-  llpp = ocaml-ng.ocamlPackages.callPackage ../applications/misc/llpp { };
+  llpp = ocaml-ng.ocamlPackages_4_04.callPackage ../applications/misc/llpp { };
 
   lmms = libsForQt5.callPackage ../applications/audio/lmms {
     lame = null;
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index a8111f9256e0..65d3de2d9e2e 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1036,5 +1036,5 @@ in rec
 
   ocamlPackages_latest = ocamlPackages_4_06;
 
-  ocamlPackages = ocamlPackages_4_04;
+  ocamlPackages = ocamlPackages_4_05;
 }