diff --git a/Utils/IO/Zip/TarGz.php b/Utils/IO/Zip/TarGz.php
index 9364afd58..c5ba4ffcf 100644
--- a/Utils/IO/Zip/TarGz.php
+++ b/Utils/IO/Zip/TarGz.php
@@ -57,7 +57,7 @@ class TarGz implements ArchiveInterface
     public static function unpack(string $source, string $destination) : bool
     {
         $destination = \str_replace('\\', '/', $destination);
-        if (!\is_dir($destination) || !\is_file($source)) {
+        if (!\is_dir($destination) || \is_file($source)) {
             return false;
         }