diff --git a/appveyor.yml b/appveyor.yml
index 4f48ef38..cb8a4157 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -82,7 +82,7 @@ install:
     - ps: >- 
         $client = New-Object Net.WebClient;
         $client.Headers.Add("user-agent", "appveyor-ci-build");
-        $client.DownloadFile http://windows.php.net/downloads/releases/sha1sum.txt;
+        $client.DownloadFile('http://windows.php.net/downloads/releases/sha1sum.txt','sha1sum.txt');
         If ($env:PHP_MINOR_VER -Match "latest") {
             $env:PHP_VERSION=type sha1sum.txt | where { $_ -match "php-($env:PHP_MAJOR_VER\.\d+)-src" } | foreach { $matches[1] }  ;
         } Else {