diff --git a/kcm/src/widget.h b/kcm/src/widget.h
--- a/kcm/src/widget.h
+++ b/kcm/src/widget.h
@@ -26,6 +26,7 @@
 #include <kscreen/config.h>
 
 class ProfilesModel;
+class QLabel;
 class QMLOutput;
 class QMLScreen;
 class ControlPanel;
@@ -89,6 +90,7 @@
 
     ProfilesModel *mProfilesModel = nullptr;
     PrimaryOutputCombo *mPrimaryCombo = nullptr;
+    QLabel *mPrimaryLabel = nullptr;
     QComboBox *mProfilesCombo = nullptr;
 
     QPushButton *mScaleAllOutputsButton = nullptr;
diff --git a/kcm/src/widget.cpp b/kcm/src/widget.cpp
--- a/kcm/src/widget.cpp
+++ b/kcm/src/widget.cpp
@@ -89,7 +89,8 @@
     mPrimaryCombo = new PrimaryOutputCombo(this);
     connect(mPrimaryCombo, &PrimaryOutputCombo::changed,
             this, &Widget::changed);
-    hbox->addWidget(new QLabel(i18n("Primary display:")));
+    mPrimaryLabel = new QLabel(i18n("Primary display:"));
+    hbox->addWidget(mPrimaryLabel);
     hbox->addWidget(mPrimaryCombo);
 
     hbox->addStretch();
@@ -176,7 +177,8 @@
     mPrimaryCombo->setConfig(mConfig);
     mUnifyButton->setEnabled(mConfig->outputs().count() > 1);
     mScaleAllOutputsButton->setVisible(!mConfig->supportedFeatures().testFlag(KScreen::Config::Feature::PerOutputScaling));
-
+    mPrimaryCombo->setVisible(mConfig->supportedFeatures().testFlag(KScreen::Config::Feature::PrimaryDisplay));
+    mPrimaryLabel->setVisible(mConfig->supportedFeatures().testFlag(KScreen::Config::Feature::PrimaryDisplay));
 
     for (const KScreen::OutputPtr &output : mConfig->outputs()) {
         connect(output.data(), &KScreen::Output::isEnabledChanged,