diff --git a/wp-includes/user.php b/wp-includes/user.php
index 6feb062dc..d24c20b2d 100644
--- a/wp-includes/user.php
+++ b/wp-includes/user.php
@@ -106,7 +106,8 @@ function wp_authenticate_username_password($user, $username, $password) {
 		return $userdata;
 
 	if ( !wp_check_password($password, $userdata->user_pass, $userdata->ID) )
-		return new WP_Error('incorrect_password', sprintf(__('<strong>ERROR</strong>: Incorrect password. <a href="%s" title="Password Lost and Found">Lost your password</a>?'), site_url('wp-login.php?action=lostpassword', 'login')));
+		return new WP_Error( 'incorrect_password', sprintf( __( '<strong>ERROR</strong>: The password you entered for the username <strong>%1$s</strong> is incorrect. <a href="%2$s" title="Password Lost and Found">Lost your password</a>?' ),
+		$username, site_url( 'wp-login.php?action=lostpassword', 'login' ) ) );
 
 	$user =  new WP_User($userdata->ID);
 	return $user;