diff --git a/dialog.cpp b/dialog.cpp
index 769aff957..cbe874776 100644
--- a/dialog.cpp
+++ b/dialog.cpp
@@ -337,7 +337,7 @@ void Dialog::syncToGraphicsWidget()
         QDesktopWidget *desktop = QApplication::desktop();
         QSize maxSize = desktop->availableGeometry(desktop->screenNumber(this)).size();
 
-        graphicsWidget->setMaximumSize(maxSize - QSize(left + right, top + bottom));
+        graphicsWidget->setMaximumSize(maxSize - QSize(left + right, top + bottom).boundedTo(graphicsWidget->effectiveSizeHint(Qt::MaximumSize).toSize()));
 
         setMinimumSize(-1, -1);
         setMaximumSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);