diff --git a/Source/Core/DolphinQt2/QtUtils/QueueOnObject.h b/Source/Core/DolphinQt2/QtUtils/QueueOnObject.h
new file mode 100644
index 0000000000..6110bccb79
--- /dev/null
+++ b/Source/Core/DolphinQt2/QtUtils/QueueOnObject.h
@@ -0,0 +1,20 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QObject>
+#include <utility>
+
+// QWidget and subclasses are not thread-safe! However, Qt's signal-slot connection mechanism will
+// invoke slots/functions on the correct thread for any object. We can (ab)use this to queue up
+// arbitrary code from non-GUI threads. For more information, see:
+// https://stackoverflow.com/questions/21646467/
+
+template <typename F>
+static void QueueOnObject(QObject* obj, F&& func)
+{
+  QObject src;
+  QObject::connect(&src, &QObject::destroyed, obj, std::forward<F>(func), Qt::QueuedConnection);
+}
diff --git a/Source/Core/DolphinQt2/WiiUpdate.cpp b/Source/Core/DolphinQt2/WiiUpdate.cpp
index 8db46852e0..de91fc0e32 100644
--- a/Source/Core/DolphinQt2/WiiUpdate.cpp
+++ b/Source/Core/DolphinQt2/WiiUpdate.cpp
@@ -18,6 +18,7 @@
 #include "Core/Core.h"
 #include "Core/WiiUtils.h"
 #include "DiscIO/NANDImporter.h"
+#include "DolphinQt2/QtUtils/QueueOnObject.h"
 
 namespace WiiUpdate
 {
@@ -62,21 +63,19 @@ void PerformOnlineUpdate(const std::string& region, QWidget* parent)
   std::future<WiiUtils::UpdateResult> result = std::async(std::launch::async, [&] {
     const WiiUtils::UpdateResult res = WiiUtils::DoOnlineUpdate(
         [&](size_t processed, size_t total, u64 title_id) {
-          Core::QueueHostJob(
-              [&dialog, &was_cancelled, processed, total, title_id]() {
-                if (was_cancelled.IsSet())
-                  return;
+          QueueOnObject(&dialog, [&dialog, &was_cancelled, processed, total, title_id]() {
+            if (was_cancelled.IsSet())
+              return;
 
-                dialog.setRange(0, static_cast<int>(total));
-                dialog.setValue(static_cast<int>(processed));
-                dialog.setLabelText(QObject::tr("Updating title %1...\nThis can take a while.")
-                                        .arg(title_id, 16, 16, QLatin1Char('0')));
-              },
-              true);
+            dialog.setRange(0, static_cast<int>(total));
+            dialog.setValue(static_cast<int>(processed));
+            dialog.setLabelText(QObject::tr("Updating title %1...\nThis can take a while.")
+                                    .arg(title_id, 16, 16, QLatin1Char('0')));
+          });
           return !was_cancelled.IsSet();
         },
         region);
-    Core::QueueHostJob([&dialog] { dialog.close(); }, true);
+    QueueOnObject(&dialog, [&dialog] { dialog.close(); });
     return res;
   });