diff --git a/context/scripts/Web.cs b/context/scripts/Web.cs
index 00b3faf1b..dd88ec3e5 100644
--- a/context/scripts/Web.cs
+++ b/context/scripts/Web.cs
@@ -200,6 +200,7 @@ private static async Task<bool> DownloadFile(string name, string sourceUrl, stri
             {
                 Stopwatch stopwatch = new Stopwatch();
                 stopwatch.Start();
+                long lastPercent = -1;
                 client.DownloadProgressChanged += (sender, args) =>
                     {
                         long percent = 100 * args.BytesReceived / args.TotalBytesToReceive;