diff --git a/src/corelib/thread/qthread_unix.cpp b/src/corelib/thread/qthread_unix.cpp
index 23a79074d69..617a5ebf28c 100644
--- a/src/corelib/thread/qthread_unix.cpp
+++ b/src/corelib/thread/qthread_unix.cpp
@@ -365,7 +365,7 @@ void QThreadPrivate::finish(void *arg)
 
         d->running = false;
         d->finished = true;
-        d->interruptionRequested = false;
+        d->interruptionRequested.store(false, std::memory_order_relaxed);
 
         d->isInFinish = false;
         d->data->threadId.storeRelaxed(nullptr);
@@ -642,7 +642,7 @@ void QThread::start(Priority priority)
     d->finished = false;
     d->returnCode = 0;
     d->exited = false;
-    d->interruptionRequested = false;
+    d->interruptionRequested.store(false, std::memory_order_relaxed);
 
     pthread_attr_t attr;
     pthread_attr_init(&attr);
diff --git a/src/corelib/thread/qthread_win.cpp b/src/corelib/thread/qthread_win.cpp
index 3e0eef411a0..74bc1d26505 100644
--- a/src/corelib/thread/qthread_win.cpp
+++ b/src/corelib/thread/qthread_win.cpp
@@ -314,7 +314,7 @@ void QThreadPrivate::finish(void *arg, bool lockAnyway) noexcept
     d->running = false;
     d->finished = true;
     d->isInFinish = false;
-    d->interruptionRequested = false;
+    d->interruptionRequested.store(false, std::memory_order_relaxed);
 
     if (!d->waiters) {
         CloseHandle(d->handle);
@@ -391,7 +391,7 @@ void QThread::start(Priority priority)
     d->finished = false;
     d->exited = false;
     d->returnCode = 0;
-    d->interruptionRequested = false;
+    d->interruptionRequested.store(false, std::memory_order_relaxed);
 
     /*
       NOTE: we create the thread in the suspended state, set the