diff --git a/lib/private/Http/CookieHelper.php b/lib/private/Http/CookieHelper.php
index f7b871c500124..122f4907b2acf 100644
--- a/lib/private/Http/CookieHelper.php
+++ b/lib/private/Http/CookieHelper.php
@@ -43,7 +43,7 @@ public static function setCookie(string $name,
 		$header = sprintf(
 			'Set-Cookie: %s=%s',
 			$name,
-			urlencode($value)
+			rawurlencode($value)
 		);
 
 		if ($path !== '') {