diff --git a/ocaml-dose3.spec b/ocaml-dose3.spec
index 4c666b0..5d8cacd 100644
--- a/ocaml-dose3.spec
+++ b/ocaml-dose3.spec
@@ -35,6 +35,7 @@ BuildRequires:  ocaml-findlib-devel
 BuildRequires:  ocaml-extlib-devel
 BuildRequires:  ocaml-expat-devel
 BuildRequires:  ocaml-re-devel
+BuildRequires:  ocaml-seq-devel
 BuildRequires:  ocaml-cudf-devel
 BuildRequires:  ocaml-cppo
 BuildRequires:  ocaml-zip-devel