1 files changed, 3 insertions, 1 deletions
diff --git a/src/corelib/thread/qthreadpool.cpp b/src/corelib/thread/qthreadpool.cpp
index 18d4103fdfc..55f13a6b02a 100644
--- a/src/corelib/thread/qthreadpool.cpp
+++ b/src/corelib/thread/qthreadpool.cpp
@@ -481,7 +481,9 @@ QThreadPool *QThreadPoolPrivate::qtGuiInstance()
 {
     Q_CONSTINIT static QPointer<QThreadPool> guiInstance;
     Q_CONSTINIT static QBasicMutex theMutex;
-
+    const static bool runtime_disable = qEnvironmentVariableIsSet("QT_NO_GUI_THREADPOOL");
+    if (runtime_disable)
+        return nullptr;
     const QMutexLocker locker(&theMutex);
     if (guiInstance.isNull() && !QCoreApplication::closingDown()) {
         guiInstance = new QThreadPool();