diff --git a/abstract_output.h b/abstract_output.h
--- a/abstract_output.h
+++ b/abstract_output.h
@@ -150,9 +150,6 @@
     void setOrientation(Qt::ScreenOrientation set) {
         m_orientation = set;
     }
-    bool internal() const {
-        return m_internal;
-    }
     void setInternal(bool set) {
         m_internal = set;
     }
diff --git a/plugins/platforms/drm/drm_output.h b/plugins/platforms/drm/drm_output.h
--- a/plugins/platforms/drm/drm_output.h
+++ b/plugins/platforms/drm/drm_output.h
@@ -165,7 +165,6 @@
     DrmDumbBuffer *m_cursor[2] = {nullptr, nullptr};
     int m_cursorIndex = 0;
     bool m_hasNewCursor = false;
-    bool m_internal = false;
     bool m_deleted = false;
 };
 
diff --git a/plugins/platforms/drm/drm_output.cpp b/plugins/platforms/drm/drm_output.cpp
--- a/plugins/platforms/drm/drm_output.cpp
+++ b/plugins/platforms/drm/drm_output.cpp
@@ -248,7 +248,7 @@
     setInternal(connector->connector_type == DRM_MODE_CONNECTOR_LVDS || connector->connector_type == DRM_MODE_CONNECTOR_eDP);
     setDpmsSupported(true);
 
-    if (internal()) {
+    if (isInternal()) {
         connect(kwinApp(), &Application::screensCreated, this,
             [this] {
                 connect(screens()->orientationSensor(), &OrientationSensor::orientationChanged, this, &DrmOutput::automaticRotation);