diff --git a/src/gui/util/qgridlayoutengine.cpp b/src/gui/util/qgridlayoutengine.cpp
index 83def02f7e..e8648eb91d 100644
--- a/src/gui/util/qgridlayoutengine.cpp
+++ b/src/gui/util/qgridlayoutengine.cpp
@@ -964,8 +964,11 @@ void QGridLayoutEngine::insertItem(QGridLayoutItem *item, int index)
 
     for (int i = item->firstRow(); i <= item->lastRow(); ++i) {
         for (int j = item->firstColumn(); j <= item->lastColumn(); ++j) {
-            if (itemAt(i, j))
-                qWarning("QGridLayoutEngine::addItem: Cell (%d, %d) already taken", i, j);
+            const auto existingItem = itemAt(i, j);
+            if (existingItem) {
+                qWarning("QGridLayoutEngine::addItem: Can't add %s at cell (%d, %d) because it's already taken by %s",
+                    qPrintable(item->toString()), i, j, qPrintable(existingItem->toString()));
+            }
             setItemAt(i, j, item);
         }
     }
diff --git a/src/gui/util/qgridlayoutengine_p.h b/src/gui/util/qgridlayoutengine_p.h
index e21d89dd2e..2f60cb99fd 100644
--- a/src/gui/util/qgridlayoutengine_p.h
+++ b/src/gui/util/qgridlayoutengine_p.h
@@ -24,6 +24,7 @@
 #include <QtCore/qpair.h>
 #include <QtCore/qsize.h>
 #include <QtCore/qrect.h>
+#include <QtCore/qdebug.h>
 
 #include <float.h>
 #include "qlayoutpolicy_p.h"
@@ -283,6 +284,8 @@ public:
 
     virtual QLayoutPolicy::ControlTypes controlTypes(LayoutSide side) const;
 
+    inline virtual QString toString() const { return QDebug::toString(this); }
+
     QRectF geometryWithin(qreal x, qreal y, qreal width, qreal height, qreal rowDescent, Qt::Alignment align, bool snapToPixelGrid) const;
     QGridLayoutBox box(Qt::Orientation orientation, bool snapToPixelGrid, qreal constraint = -1.0) const;