diff --git a/mainwindow.cpp b/mainwindow.cpp
index dad420a..cf84e33 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -172,7 +172,7 @@ void MainWindow::leaveEvent(QEvent *event)
 
 void MainWindow::mousePressEvent(QMouseEvent *event)
 {
-    if (event->buttons() & Qt::LeftButton) {
+    if (event->buttons() & Qt::LeftButton && !isMaximized()) {
         m_clickedOnWindow = true;
         m_oldMousePos = event->pos();
         qDebug() << m_oldMousePos << m_graphicsView->transform().m11()