diff --git a/core/CCIO.ml b/core/CCIO.ml
index 5f8a6116..1ebe7064 100644
--- a/core/CCIO.ml
+++ b/core/CCIO.ml
@@ -26,7 +26,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 (** {1 IO Utils} *)
 
-type 'a or_error = [ `Ok of 'a | `Error of string ]  (** See {!CCError} *)
 type 'a gen = unit -> 'a option  (** See {!CCGen} *)
 
 let with_in ?(mode=0o644) ?(flags=[]) filename f =
diff --git a/core/CCIO.mli b/core/CCIO.mli
index 20bdd622..3e18f3e9 100644
--- a/core/CCIO.mli
+++ b/core/CCIO.mli
@@ -59,7 +59,6 @@ Examples:
 ]}
 *)
 
-type 'a or_error = [ `Ok of 'a | `Error of string ]  (** See {!CCError} *)
 type 'a gen = unit -> 'a option  (** See {!CCGen} *)
 
 (** {2 Input} *)
@@ -128,6 +127,7 @@ See {!File.walk} if you also need to list directories:
 {[
 # let content = CCIO.File.walk (CCIO.File.make "/tmp");;
 # CCGen.map CCIO.File.show_walk_item content |> CCIO.write_lines stdout;;
+]}
 *)
 
 module File : sig