diff --git a/src/duckstation-qt/autoupdaterdialog.cpp b/src/duckstation-qt/autoupdaterdialog.cpp
index e1f288d5e..b74dbfded 100644
--- a/src/duckstation-qt/autoupdaterdialog.cpp
+++ b/src/duckstation-qt/autoupdaterdialog.cpp
@@ -440,6 +440,10 @@ void AutoUpdaterDialog::downloadUpdateClicked()
     },
     &progress);
 
+  // Since we're going to block, don't allow the timer to poll, otherwise the progress callback can cause the timer to
+  // run, and recursively poll again.
+  m_http_poll_timer->stop();
+
   // Block until completion.
   while (m_http->HasAnyRequests())
   {