diff --git a/src/plugins/platforms/vnc/qvnc.cpp b/src/plugins/platforms/vnc/qvnc.cpp
index 433d2284ee..3c837399c0 100644
--- a/src/plugins/platforms/vnc/qvnc.cpp
+++ b/src/plugins/platforms/vnc/qvnc.cpp
@@ -477,6 +477,9 @@ void QRfbRawEncoder::write()
 //                     server->screen()->geometry().height());
 //    }
 
+    const QImage screenImage = client->server()->screenImage();
+    rgn &= screenImage.rect();
+
     const auto rectsInRegion = rgn.rectCount();
 
     {
@@ -492,8 +495,6 @@ void QRfbRawEncoder::write()
     if (rectsInRegion <= 0)
         return;
 
-    const QImage screenImage = client->server()->screenImage();
-
     for (const QRect &tileRect: rgn) {
         const QRfbRect rect(tileRect.x(), tileRect.y(),
                             tileRect.width(), tileRect.height());