diff --git a/abstract_wayland_output.h b/abstract_wayland_output.h
--- a/abstract_wayland_output.h
+++ b/abstract_wayland_output.h
@@ -73,7 +73,11 @@
     QString name() const override;
     QByteArray uuid() const override;
 
+    QSize modeSize() const;
+
+    // TODO: The name is ambiguous. Rename this function.
     QSize pixelSize() const;
+
     qreal scale() const override;
 
     /**
diff --git a/abstract_wayland_output.cpp b/abstract_wayland_output.cpp
--- a/abstract_wayland_output.cpp
+++ b/abstract_wayland_output.cpp
@@ -88,6 +88,11 @@
     }
 }
 
+QSize AbstractWaylandOutput::modeSize() const
+{
+    return m_waylandOutputDevice->pixelSize();
+}
+
 QSize AbstractWaylandOutput::pixelSize() const
 {
     return orientateSize(m_waylandOutputDevice->pixelSize());