diff --git a/queries/ocaml/highlights.scm b/queries/ocaml/highlights.scm
index 0c9f28f65..855e3e547 100644
--- a/queries/ocaml/highlights.scm
+++ b/queries/ocaml/highlights.scm
@@ -131,7 +131,9 @@
 
 [
   (prefix_operator)
+  (sign_operator)
   (infix_operator)
+  (hash_operator)
   (indexing_operator)
   (let_operator)
   (and_operator)