Index: src/wp-admin/network/user-new.php
===================================================================
--- src/wp-admin/network/user-new.php	(revision 54858)
+++ src/wp-admin/network/user-new.php	(working copy)
@@ -124,14 +124,15 @@
 	</div>
 <?php } ?>
 	<form action="<?php echo esc_url( network_admin_url( 'user-new.php?action=add-user' ) ); ?>" id="adduser" method="post" novalidate="novalidate">
+	<p><?php echo wp_required_field_message(); ?></p>
 	<table class="form-table" role="presentation">
 		<tr class="form-field form-required">
-			<th scope="row"><label for="username"><?php _e( 'Username' ); ?></label></th>
-			<td><input type="text" class="regular-text" name="user[username]" id="username" autocapitalize="none" autocorrect="off" maxlength="60" /></td>
+			<th scope="row"><label for="username"><?php _e( 'Username' ); ?> <?php echo wp_required_field_indicator(); ?></label></th>
+			<td><input type="text" class="regular-text" name="user[username]" id="username" autocapitalize="none" autocorrect="off" maxlength="60" required="required" /></td>
 		</tr>
 		<tr class="form-field form-required">
-			<th scope="row"><label for="email"><?php _e( 'Email' ); ?></label></th>
-			<td><input type="email" class="regular-text" name="user[email]" id="email" /></td>
+			<th scope="row"><label for="email"><?php _e( 'Email' ); ?> <?php echo wp_required_field_indicator(); ?></label></th>
+			<td><input type="email" class="regular-text" name="user[email]" id="email" required="required" /></td>
 		</tr>
 		<tr class="form-field">
 			<td colspan="2" class="td-full"><?php _e( 'A password reset link will be sent to the user via email.' ); ?></td>