diff --git a/pluggable.php src/wp-includes/pluggable.php
index 9954ca9..9936858 100755
--- a/pluggable.php
+++ src/wp-includes/pluggable.php
@@ -976,17 +976,6 @@ if ( ! function_exists( 'wp_clear_auth_cookie' ) ) :
 		setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
 		setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
 		setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
+
+		$pass_cookie='';
+		foreach($_COOKIE as $key=>$value){
+			if(!strncmp($key,"wp-postpass_",12)){
+				$pass_cookie = $key;
+				break;
+			}
+		}
+		if($pass_cookie){
+			setcookie($pass_cookie,'',0);
+		}
 	}
 endif;