diff --git src/wp-login.php src/wp-login.php
index fd97572..aadcc2e 100644
--- src/wp-login.php
+++ src/wp-login.php
@@ -389,10 +389,12 @@ function retrieve_password() {
 	 *
 	 * @since 2.8.0
 	 *
-	 * @param string $message Default mail message.
-	 * @param string $key     The activation key.
+	 * @param string 	$message 		Default mail message.
+	 * @param string 	$key     		The activation key.
+	 * @param string 	$user_login		The username for the user.
+	 * @param WP_User 	$user_data  	WP_User object.
 	 */
-	$message = apply_filters( 'retrieve_password_message', $message, $key );
+	$message = apply_filters( 'retrieve_password_message', $message, $key, $user_login, $user_data );
 
 	if ( $message && !wp_mail( $user_email, wp_specialchars_decode( $title ), $message ) )
 		wp_die( __('The e-mail could not be sent.') . "<br />\n" . __('Possible reason: your host may have disabled the mail() function.') );