diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
index d9571d2314..fc45805958 100644
--- a/gnu/packages/ocaml.scm
+++ b/gnu/packages/ocaml.scm
@@ -208,7 +208,7 @@ Git-friendly development workflow.")
                 "0icdfzhsbgf89925gc8gl3fm8z2xzszzlib0v9dj5wyzkyv3a342"))
               (file-name (string-append name "-" version ".tar.gz"))))
     (build-system gnu-build-system)
-    (native-inputs `(("ocaml" ,ocaml))
+    (native-inputs `(("ocaml" ,ocaml)
                      ("which" ,which)))
     (inputs `(("ocaml" ,ocaml)))
     (arguments