diff --git a/ocaml/mk_meta.sh b/ocaml/mk_meta.sh
index 31e87ba..d45ed16 100755
--- a/ocaml/mk_meta.sh
+++ b/ocaml/mk_meta.sh
@@ -4,7 +4,7 @@ set -e
 
 cat >META <<EOF
 description = "bindings to the dash shell as a library"
-requires = "ctypes,ctypes.foreign"
+requires = "ctypes,ctypes.foreign,str"
 version = "0.1"
 archive(native) = "dash.cmxa"
 archive(byte) = "dash.cma"