diff --git a/OCaml.gitignore b/OCaml.gitignore
index a18e0840..250caf74 100644
--- a/OCaml.gitignore
+++ b/OCaml.gitignore
@@ -8,7 +8,14 @@
 *.cmxs
 *.cmxa
 
-# ocamlbuild working directory
+# Files containing detailed information about the compilation (generated
+# by `ocamlc`/`ocamlopt` when invoked using the option `-bin-annot`).
+# These files are typically useful for code inspection tools
+# (e.g. Merlin).
+*.cmt
+*.cmti
+
+# ocamlbuild and Dune default working directory
 _build/
 
 # ocamlbuild targets