diff --git a/src/file/mainhub.cpp b/src/file/mainhub.cpp
--- a/src/file/mainhub.cpp
+++ b/src/file/mainhub.cpp
@@ -44,6 +44,8 @@
 
     connect(&m_fileWatcher, &FileWatch::installedWatches, &m_fileIndexScheduler, &FileIndexScheduler::checkUnindexedFiles);
 
+    connect(QCoreApplication::instance(), &QCoreApplication::aboutToQuit, &m_fileIndexScheduler, &FileIndexScheduler::halt);
+
     MainAdaptor* main = new MainAdaptor(this);
     Q_UNUSED(main)