diff --git a/src/xdgshellwindow.cpp b/src/xdgshellwindow.cpp
index 882a164e90..40e00ab518 100644
--- a/src/xdgshellwindow.cpp
+++ b/src/xdgshellwindow.cpp
@@ -1215,14 +1215,14 @@ void XdgToplevelWindow::handlePongReceived(quint32 serial)
 
 void XdgToplevelWindow::handleMaximumSizeChanged()
 {
-    m_minimumSize = m_shellSurface->minimumSize();
+    m_maximumSize = m_shellSurface->maximumSize();
     updateCapabilities();
     Q_EMIT maximizeableChanged(isMaximizable());
 }
 
 void XdgToplevelWindow::handleMinimumSizeChanged()
 {
-    m_maximumSize = m_shellSurface->maximumSize();
+    m_minimumSize = m_shellSurface->minimumSize();
     updateCapabilities();
     Q_EMIT maximizeableChanged(isMaximizable());
 }