diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 3cbb1dc8a4bcb..e2eb6edd79701 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -2050,7 +2050,7 @@ in let inherit (pkgs) callPackage; in rec
 
   ocamlPackages_latest = ocamlPackages_5_2;
 
-  ocamlPackages = ocamlPackages_5_1;
+  ocamlPackages = ocamlPackages_5_2;
 
   # We still have packages that rely on unsafe-string, which is deprecated in OCaml 4.06.0.
   # Below are aliases for porting them to the latest versions of the OCaml 4 series.