Refine check for null web exception response.

1 files changed, 2 insertions, 2 deletions

diff --git a/Duplicati/Library/Backend/Sia/Sia.cs b/Duplicati/Library/Backend/Sia/Sia.cs
index 62db58a37..a9c0f1030 100644
--- a/Duplicati/Library/Backend/Sia/Sia.cs
+++ b/Duplicati/Library/Backend/Sia/Sia.cs
@@ -83,13 +83,13 @@ namespace Duplicati.Library.Backend.Sia
 
         private string getResponseBodyOnError(string context, System.Net.WebException wex)
         {
-            if (wex.Response is null)
+            HttpWebResponse response = wex.Response as HttpWebResponse;
+            if (response is null)
             {
                 return $"{context} failed with error: {wex.Message}";
             }
 
             string body = "";
-            System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)wex.Response;
             using (System.IO.Stream data = response.GetResponseStream())
             using (var reader = new System.IO.StreamReader(data))
             {