diff --git a/ocaml-lwt.spec b/ocaml-lwt.spec
index 7f27077..4791d7a 100644
--- a/ocaml-lwt.spec
+++ b/ocaml-lwt.spec
@@ -2,7 +2,7 @@
 
 Name:          ocaml-lwt
 Version:       5.5.0
-Release:       2mamba
+Release:       3mamba
 Summary:       OCaml promises and concurrent I/O
 Group:         System/Libraries/OCaml
 Vendor:        openmamba
@@ -34,6 +34,7 @@ BuildRequires: ocaml-camlp4-devel
 BuildRequires: ocaml-findlib
 BuildRequires: ocaml-ctypes-devel >= 0.20.0-2mamba
 BuildRequires: ocaml-luv-devel >= 0.5.11-2mamba
+BuildRequires: ocaml-mmap-devel >= 1.2.0
 BuildRequires: dune
 
 %description
@@ -90,6 +91,9 @@ rm -rf %{buildroot}/usr/doc
 %doc CHANGES README.md
 
 %changelog
+* Sat Mar 12 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 5.5.0-3mamba
+- rebuilt with ocaml-mmap 1.2.0
+
 * Wed Feb 09 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 5.5.0-2mamba
 - rebuilt with ocaml-ctypes 0.20.0-2mamba