Index: src/wp-signup.php
===================================================================
--- src/wp-signup.php	(revision 39548)
+++ src/wp-signup.php	(working copy)
@@ -822,7 +822,7 @@
 $i18n_signup['blog'] = _x('blog', 'Multisite active signup type');
 $i18n_signup['user'] = _x('user', 'Multisite active signup type');
 
-if ( is_super_admin() ) {
+if ( current_user_can( 'manage_network' ) ) {
 	/* translators: 1: type of site sign-up; 2: network settings URL */
 	echo '<div class="mu_alert">' . sprintf( __( 'Greetings Site Administrator! You are currently allowing &#8220;%s&#8221; registrations. To change or disable registration go to your <a href="%s">Options page</a>.' ), $i18n_signup[$active_signup], esc_url( network_admin_url( 'settings.php' ) ) ) . '</div>';
 }