1 files changed, 3 insertions, 2 deletions
diff --git a/src/gui/kernel/qrasterwindow.cpp b/src/gui/kernel/qrasterwindow.cpp
index 947f2bb6a8..d8d448249e 100644
--- a/src/gui/kernel/qrasterwindow.cpp
+++ b/src/gui/kernel/qrasterwindow.cpp
@@ -73,8 +73,9 @@ public:
     void beginPaint(const QRegion &region) Q_DECL_OVERRIDE
     {
         Q_Q(QRasterWindow);
-        if (backingstore->size() != q->size()) {
-            backingstore->resize(q->size());
+        const QSize size = q->size();
+        if (backingstore->size() != size) {
+            backingstore->resize(size);
             markWindowAsDirty();
         }
         backingstore->beginPaint(region);