diff --git a/plugins/platforms/x11/standalone/x11_decoration_renderer.cpp b/plugins/platforms/x11/standalone/x11_decoration_renderer.cpp
--- a/plugins/platforms/x11/standalone/x11_decoration_renderer.cpp
+++ b/plugins/platforms/x11/standalone/x11_decoration_renderer.cpp
@@ -88,7 +88,7 @@
     bottom = bottom.intersected(geometry);
 
     auto renderPart = [this, c](const QRect &geo) {
-        if (geo.isNull()) {
+        if (!geo.isValid()) {
             return;
         }
         QImage image = renderToImage(geo);
diff --git a/plugins/scenes/opengl/scene_opengl.cpp b/plugins/scenes/opengl/scene_opengl.cpp
--- a/plugins/scenes/opengl/scene_opengl.cpp
+++ b/plugins/scenes/opengl/scene_opengl.cpp
@@ -2490,7 +2490,7 @@
     const QRect geometry = dirty ? QRect(QPoint(0, 0), client()->client()->geometry().size()) : scheduled.boundingRect();
 
     auto renderPart = [this](const QRect &geo, const QRect &partRect, const QPoint &offset, bool rotated = false) {
-        if (geo.isNull()) {
+        if (!geo.isValid()) {
             return;
         }
         QImage image = renderToImage(geo);
diff --git a/plugins/scenes/xrender/scene_xrender.cpp b/plugins/scenes/xrender/scene_xrender.cpp
--- a/plugins/scenes/xrender/scene_xrender.cpp
+++ b/plugins/scenes/xrender/scene_xrender.cpp
@@ -1226,7 +1226,7 @@
         xcb_create_gc(c, m_gc, m_pixmaps[int(DecorationPart::Top)], 0, nullptr);
     }
     auto renderPart = [this, c](const QRect &geo, const QPoint &offset, int index) {
-        if (geo.isNull()) {
+        if (!geo.isValid()) {
             return;
         }
         QImage image = renderToImage(geo);