diff --git a/modules/lang/ocaml/config.el b/modules/lang/ocaml/config.el
index cb5cce429..4ab8956ca 100644
--- a/modules/lang/ocaml/config.el
+++ b/modules/lang/ocaml/config.el
@@ -109,7 +109,7 @@
   :config
   ;; TODO Fix region-based formatting support
   (defun +ocaml-init-ocamlformat-h ()
-    (setq +format-with 'ocp-indent)
+    (setq-local +format-with 'ocp-indent)
     (when (and (executable-find "ocamlformat")
                (locate-dominating-file default-directory ".ocamlformat"))
       (when buffer-file-name
@@ -118,7 +118,7 @@
                  (setq-local ocamlformat-file-kind 'implementation))
                 ((equal ext ".eliomi")
                  (setq-local ocamlformat-file-kind 'interface)))))
-      (setq +format-with 'ocamlformat))))
+      (setq-local +format-with 'ocamlformat))))
 
 ;; Tree sitter
 (eval-when! (modulep! +tree-sitter)