diff --git a/opam b/opam
index 98868b5..15aba0c 100644
--- a/opam
+++ b/opam
@@ -12,7 +12,11 @@ install: [make "install"]
 remove: [
     ["ocamlfind" "remove" "sequence"]
 ]
-depends: ["ocamlfind" "base-bytes"]
+depends: [
+  "ocamlfind"
+  "base-bytes"
+  "ocamlbuild" {build}
+]
 tags: [ "sequence" "iterator" "iter" "fold" ]
 homepage: "https://github.com/c-cube/sequence/"
 depopts: ["delimcc" "base-bigarray"]