diff --git a/gnu/packages/ocaml.scm b/gnu/packages/ocaml.scm
index 21d16a46a1..dd30f4cc97 100644
--- a/gnu/packages/ocaml.scm
+++ b/gnu/packages/ocaml.scm
@@ -3453,6 +3453,7 @@ JSON.")
        (uri (git-reference
              (url home-page)
              (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
        (sha256
         (base32
          "10bf28my1yhj8a2d7bkgbna9j20wq0ghp92k926y29bmjj2qh0l7"))))