diff --git a/client/mysql.cc b/client/mysql.cc
index 8e6f1938fd8..4099490356b 100644
--- a/client/mysql.cc
+++ b/client/mysql.cc
@@ -1491,7 +1491,7 @@ static bool do_connect(MYSQL *mysql, const char *host, const char *user,
   if (opt_secure_auth)
     mysql_options(mysql, MYSQL_SECURE_AUTH, (char *) &opt_secure_auth);
 #if defined(HAVE_OPENSSL) && !defined(EMBEDDED_LIBRARY)
-  if (opt_use_ssl)
+  if (opt_use_ssl && opt_protocol <= MYSQL_PROTOCOL_SOCKET)
   {
     mysql_ssl_set(mysql, opt_ssl_key, opt_ssl_cert, opt_ssl_ca,
 		  opt_ssl_capath, opt_ssl_cipher);
diff --git a/extra/mariabackup/backup_mysql.cc b/extra/mariabackup/backup_mysql.cc
index 28424f5cf32..e06a3ae1b5c 100644
--- a/extra/mariabackup/backup_mysql.cc
+++ b/extra/mariabackup/backup_mysql.cc
@@ -131,7 +131,7 @@ xb_mysql_connect()
 	       opt_socket ? opt_socket : "not set");
 
 #ifdef HAVE_OPENSSL
-	if (opt_use_ssl)
+	if (opt_use_ssl && opt_protocol <= MYSQL_PROTOCOL_SOCKET)
 	{
 		mysql_ssl_set(connection, opt_ssl_key, opt_ssl_cert,
 			      opt_ssl_ca, opt_ssl_capath,