diff --git a/src/ui/mark.cpp b/src/ui/mark.cpp
index a22fc7f3743cda8c16afdddface631043ce3b7ac..366638a1851a9d1ba8976bf0c712341f5d9c0cfb 100644
--- a/src/ui/mark.cpp
+++ b/src/ui/mark.cpp
@@ -35,8 +35,10 @@
 #include <QShortcut>
 #include <QToolButton>
 #include <QtGlobal>
+#include <QtConcurrent/QtConcurrentRun>
 
 #include <KActionCollection>
+#include <QFutureWatcher>
 
 static QDir markTempDirectory()
 {
@@ -457,7 +459,23 @@ void marK::autoSave()
     if (m_autoSaveType == Serializer::OutputType::None)
         return;
 
-    Serializer::write(m_filepath, m_ui->containerWidget->savedObjects(), m_autoSaveType);
+    auto *watcher = new QFutureWatcher<bool>();
+    connect(watcher, &QFutureWatcher<bool>::finished, this, [watcher]() {
+        bool success = watcher->result();
+        delete watcher;
+
+        if (!success) {
+            QMessageBox msgBox;
+            msgBox.setText("Failed to auto-save annotation.");
+            msgBox.setIcon(QMessageBox::Warning);
+            msgBox.exec();
+        }
+    });
+
+    QFuture<bool> future = QtConcurrent::run(
+        Serializer::write, m_filepath, m_ui->containerWidget->savedObjects(), m_autoSaveType
+    );
+    watcher->setFuture(future);
 }
 
 marK::~marK()