diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index a452c5296b..3ca6a32c57 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -3260,7 +3260,7 @@ (define-public opensmtpd-extras
     (inputs
      `(("libressl" ,libressl)
        ("libevent" ,libevent)
-       ("mysql" ,mysql)
+       ("mysql" ,mariadb "dev")
        ("opensmtpd" ,opensmtpd)
        ("postgresql" ,postgresql)
        ("python" ,python-2)