diff --git a/wp-admin/network/site-new.php b/wp-admin/network/site-new.php
index 92dcf32f2d..d3f6fb62cf 100644
--- a/wp-admin/network/site-new.php
+++ b/wp-admin/network/site-new.php
@@ -229,7 +229,17 @@ if ( ! empty( $messages ) ) {
 			<td colspan="2"><?php _e( 'A new user will be created if the above email address is not in the database.' ) ?><br /><?php _e( 'The username and password will be mailed to this email address.' ) ?></td>
 		</tr>
 	</table>
-	<?php submit_button( __('Add Site'), 'primary', 'add-site' ); ?>
+
+	<?php
+	/**
+	 * Fires at the end of the new site form in network admin.
+	 *
+	 * @since 4.5.0
+	 */
+	do_action( 'network_site_new_form' );
+
+	submit_button( __( 'Add Site' ), 'primary', 'add-site' );
+	?>
 	</form>
 </div>
 <?php
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 35a8f6829c..3b39c14bae 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-36554';
+$wp_version = '4.5-alpha-36555';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.