diff --git a/stdlib/listLabels.mli b/stdlib/listLabels.mli
index 45e3c41ea1c6..a9be40b945d9 100644
--- a/stdlib/listLabels.mli
+++ b/stdlib/listLabels.mli
@@ -280,6 +280,10 @@ val fast_sort : cmp:('a -> 'a -> int) -> 'a list -> 'a list
 (** Same as {!List.sort} or {!List.stable_sort}, whichever is faster
     on typical input. *)
 
+val sort_uniq : cmp:('a -> 'a -> int) -> 'a list -> 'a list
+(** Same as {!ListLabels.sort}, but also remove duplicates.
+    @since 4.02.0 *)
+
 val merge : cmp:('a -> 'a -> int) -> 'a list -> 'a list -> 'a list
 (** Merge two lists:
     Assuming that [l1] and [l2] are sorted according to the