diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index 30272187999..27b69bc5b0b 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -10759,6 +10759,7 @@ void QWidget::setParent(QWidget *parent, Qt::WindowFlags f)
     const bool resized = testAttribute(Qt::WA_Resized);
     const bool wasCreated = testAttribute(Qt::WA_WState_Created);
     QWidget *oldtlw = window();
+    Q_ASSERT(oldtlw);
 
     if (f & Qt::Window) // Frame geometry likely changes, refresh.
         d->data.fstrut_dirty = true;
@@ -10801,7 +10802,7 @@ void QWidget::setParent(QWidget *parent, Qt::WindowFlags f)
 
     // texture-based widgets need a pre-notification when their associated top-level window changes
     // This is not under the wasCreated/newParent conditions above in order to also play nice with QDockWidget.
-    if ((oldtlw && oldtlw->d_func()->usesRhiFlush) && ((!parent && parentWidget()) || (parent && parent->window() != oldtlw)))
+    if (oldtlw->d_func()->usesRhiFlush && ((!parent && parentWidget()) || (parent && parent->window() != oldtlw)))
         qSendWindowChangeToTextureChildrenRecursively(this, QEvent::WindowAboutToChangeInternal);
 
     // If we get parented into another window, children will be folded
@@ -10882,7 +10883,7 @@ void QWidget::setParent(QWidget *parent, Qt::WindowFlags f)
 
     // texture-based widgets need another event when their top-level window
     // changes (more precisely, has already changed at this point)
-    if ((oldtlw && oldtlw->d_func()->usesRhiFlush) && oldtlw != window())
+    if (oldtlw->d_func()->usesRhiFlush && oldtlw != window())
         qSendWindowChangeToTextureChildrenRecursively(this, QEvent::WindowChangeInternal);
 
     if (!wasCreated) {