diff --git a/src/blackmisc/worker.cpp b/src/blackmisc/worker.cpp
index d7a148514..3b2b11137 100644
--- a/src/blackmisc/worker.cpp
+++ b/src/blackmisc/worker.cpp
@@ -161,6 +161,8 @@ namespace BlackMisc
     void CContinuousWorker::quitAndWait() noexcept
     {
         Q_ASSERT_X(!CThreadUtils::isApplicationThreadObjectThread(this), Q_FUNC_INFO, "Try to stop main thread");
+        Q_ASSERT_X(!CThreadUtils::isCurrentThreadObjectThread(this), Q_FUNC_INFO, "Called by own thread, will deadlock");
+
         setEnabled(false);
         auto *ownThread = thread();
         quit();