diff --git a/ocaml-mysql.spec b/ocaml-mysql.spec
index 251b006..922e764 100644
--- a/ocaml-mysql.spec
+++ b/ocaml-mysql.spec
@@ -19,6 +19,10 @@ BuildRequires:  ocaml-findlib-devel
 BuildRequires:  ocaml-ocamldoc
 BuildRequires:  ocaml-camlp4-devel
 BuildRequires:  mariadb-connector-c-devel
+# XXX openssl-devel should be required by mariadb-connector-c-devel
+# but it is not so we have to explicitly request it here.  See also
+# https://bugzilla.redhat.com/show_bug.cgi?id=1493692#c4
+BuildRequires:  openssl-devel
 BuildRequires:  chrpath