diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
index 7f4e2ed6f6..9ac8975afb 100644
--- a/gnu/packages/ocaml.scm
+++ b/gnu/packages/ocaml.scm
@@ -872,6 +872,9 @@ compilers that can directly deal with packages.")
 other XUnit testing frameworks.")
     (license license:expat)))
 
+(define-public ocaml4.01-ounit
+  (package-with-ocaml4.01 ocaml-ounit))
+
 (define-public camlzip
   (package
     (name "camlzip")