diff --git a/opam b/opam
index fcd22ffb..a1ac6cd4 100644
--- a/opam
+++ b/opam
@@ -20,7 +20,7 @@ remove: [
 depends: [
   "ocamlfind" {build}
   "ocamlbuild" {build}
-  "dolmen" {test && = "dev" }
+  "dolmen" {test & = "dev" }
 ]
 available: [
   ocaml-version >= "4.00.1"