diff --git wp-includes/ms-functions.php wp-includes/ms-functions.php
index 9166251..994220e 100644
--- wp-includes/ms-functions.php
+++ wp-includes/ms-functions.php
@@ -850,12 +850,11 @@ function wpmu_signup_blog_notification( $domain, $path, $title, $user, $user_ema
 		 * @param array  $meta       By default, contains the requested privacy setting and lang_id.
 		 */
 		apply_filters( 'wpmu_signup_blog_notification_email',
-			__( "To activate your blog, please click the following link:\n\n%s\n\nAfter you activate, you will receive *another email* with your login.\n\nAfter you activate, you can visit your site here:\n\n%s" ),
+			__( "To activate your blog, please click the following link:\n\n%1$s\n\nAfter you activate, you will receive *another email* with your login.\n\nAfter you activate, you can visit your site here:\n\n%2$s" ),
 			$domain, $path, $title, $user, $user_email, $key, $meta
 		),
 		$activate_url,
-		esc_url( "http://{$domain}{$path}" ),
-		$key
+		esc_url( "http://{$domain}{$path}" )
 	);
 	// TODO: Don't hard code activation link.
 	$subject = sprintf(