diff --git a/src/core/CCArray.mli b/src/core/CCArray.mli
index d6aeac97..af710ac7 100644
--- a/src/core/CCArray.mli
+++ b/src/core/CCArray.mli
@@ -142,6 +142,7 @@ val find : ('a -> 'b option) -> 'a t -> 'b option
     @deprecated since 1.3, use {!find_map} instead.
     The version with labels is
     @deprecated since 2.1, use {!find_map} instead. *)
+[@@ocaml.deprecated "use find_map instead"]
 
 val find_map_i : (int -> 'a -> 'b option) -> 'a t -> 'b option
 (** [find_map_i f a] is like {!find_map}, but the index of the element is also passed
@@ -152,9 +153,10 @@ val find_map_i : (int -> 'a -> 'b option) -> 'a t -> 'b option
 val findi : (int -> 'a -> 'b option) -> 'a t -> 'b option
 (** [findi f a] is an alias to {!find_map_i}.
     @since 0.3.4
-    @deprecated since 1.3, use {!find_map} instead.
+    @deprecated since 1.3, use {!find_map_i} instead.
     The version with labels is
-    @deprecated since 2.1, use {!find_map} instead. *)
+    @deprecated since 2.1, use {!find_map_i} instead. *)
+[@@ocaml.deprecated "use find_map_i instead"]
 
 val find_idx : ('a -> bool) -> 'a t -> (int * 'a) option
 (** [find_idx f a] returns [Some (i,x)] where [x] is the [i]-th element of [a],
diff --git a/src/core/CCArrayLabels.mli b/src/core/CCArrayLabels.mli
index c914de21..76684e5b 100644
--- a/src/core/CCArrayLabels.mli
+++ b/src/core/CCArrayLabels.mli
@@ -140,6 +140,7 @@ val find : f:('a -> 'b option) -> 'a t -> 'b option
     @deprecated since 1.3, use {!find_map} instead.
     The version with labels is
     @deprecated since 2.1, use {!find_map} instead. *)
+[@@ocaml.deprecated "use find_map instead"]
 
 val find_map_i : f:(int -> 'a -> 'b option) -> 'a t -> 'b option
 (** [find_map_i ~f a] is like {!find_map}, but the index of the element is also passed
@@ -150,9 +151,10 @@ val find_map_i : f:(int -> 'a -> 'b option) -> 'a t -> 'b option
 val findi : f:(int -> 'a -> 'b option) -> 'a t -> 'b option
 (** [findi ~f a] is an alias to {!find_map_i}.
     @since 0.3.4
-    @deprecated since 1.3, use {!find_map} instead.
+    @deprecated since 1.3, use {!find_map_i} instead.
     The version with labels is
-    @deprecated since 2.1, use {!find_map} instead. *)
+    @deprecated since 2.1, use {!find_map_i} instead. *)
+[@@ocaml.deprecated "use find_map_i instead"]
 
 val find_idx : f:('a -> bool) -> 'a t -> (int * 'a) option
 (** [find_idx ~f a] returns [Some (i,x)] where [x] is the [i]-th element of [a],
diff --git a/src/core/CCBool.mli b/src/core/CCBool.mli
index 8e341368..ea4ad095 100644
--- a/src/core/CCBool.mli
+++ b/src/core/CCBool.mli
@@ -20,6 +20,7 @@ val of_int : int -> t
 val negate : t -> t
 (** Negation on booleans (functional version of [not]).
     @deprecated since 1.3, simply use {!not} instead. *)
+[@@ocaml.deprecated "use `not` instead"]
 
 type 'a printer = Format.formatter -> 'a -> unit
 
diff --git a/src/core/CCFloat.mli b/src/core/CCFloat.mli
index aaf21ce3..8cddeb8b 100644
--- a/src/core/CCFloat.mli
+++ b/src/core/CCFloat.mli
@@ -102,6 +102,7 @@ val of_string : string -> t
 (** Alias to {!float_of_string}.
     @deprecated since 1.2, use {!of_string_exn} instead.
     @raise Failure in case of failure. *)
+[@@ocaml.deprecated "use of_string_exn instead"]
 
 val equal_precision : epsilon:t -> t -> t -> bool
 (** Equality with allowed error up to a non negative epsilon value. *)
diff --git a/src/core/CCInt64.mli b/src/core/CCInt64.mli
index b0cdffaa..44de9fe0 100644
--- a/src/core/CCInt64.mli
+++ b/src/core/CCInt64.mli
@@ -122,6 +122,7 @@ val of_int : int -> t
 val of_int_exn : int -> t
 (** Alias to {!Int64.of_int}.
     @deprecated since 2.1, use {!Int64.of_int} instead. *)
+[@@ocaml.deprecated "use Int64.of_int instead"]
 
 val to_int32 : t -> int32
 (** Convert the given 64-bit integer (type [int64]) to a
@@ -136,6 +137,7 @@ val of_int32 : int32 -> t
 val of_int32_exn : int32 -> t
 (** Alias to {!Int64.of_int32}.
     @deprecated since 2.1, use {!Int64.of_int32} instead. *)
+[@@ocaml.deprecated "use Int64.of_int32 instead"]
 
 val to_nativeint : t -> nativeint
 (** Convert the given 64-bit integer (type [int64]) to a
@@ -150,6 +152,7 @@ val of_nativeint : nativeint -> t
 val of_nativeint_exn : nativeint -> t
 (** Alias to {!Int64.of_nativeint}.
     @deprecated since 2.1, use {!Int64.of_nativeint} instead. *)
+[@@ocaml.deprecated "use Int64.of_nativeint instead"]
 
 val to_float : t -> float
 (** Convert the given 64-bit integer to a floating-point number. *)
@@ -165,6 +168,7 @@ val of_float : float -> t
 val of_float_exn : float -> t
 (** Alias to {!Int64.of_float}.
     @deprecated since 2.1, use {!Int64.of_float} instead. *)
+[@@ocaml.deprecated "use Int64.of_float instead"]
 
 val to_string : t -> string
 (** Return the string representation of its argument, in decimal. *)
diff --git a/src/core/CCRandom.mli b/src/core/CCRandom.mli
index 9b1247f8..afe7e3c0 100644
--- a/src/core/CCRandom.mli
+++ b/src/core/CCRandom.mli
@@ -67,6 +67,7 @@ val sample_without_replacement:
     @deprecated use sample_without_duplicates instead
     @raise Invalid_argument if [n <= 0].
     @since 0.15 *)
+[@@ocaml.deprecated "use sample_without_duplicates instead"]
 
 val sample_without_duplicates:
   cmp:('a -> 'a -> int) -> int -> 'a t -> 'a list t