diff --git a/plugins/windowsystem/windoweffects.h b/plugins/windowsystem/windoweffects.h
--- a/plugins/windowsystem/windoweffects.h
+++ b/plugins/windowsystem/windoweffects.h
@@ -41,7 +41,9 @@
     void highlightWindows(WId controller, const QList<WId> &ids) override;
     void enableBlurBehind(WId window, bool enable = true, const QRegion &region = QRegion()) override;
     void enableBackgroundContrast(WId window, bool enable = true, qreal contrast = 1, qreal intensity = 1, qreal saturation = 1, const QRegion &region = QRegion()) override;
+#if KWINDOWSYSTEM_BUILD_DEPRECATED_SINCE(5, 67)
     void markAsDashboard(WId window) override;
+#endif
 };
 
 }
diff --git a/plugins/windowsystem/windoweffects.cpp b/plugins/windowsystem/windoweffects.cpp
--- a/plugins/windowsystem/windoweffects.cpp
+++ b/plugins/windowsystem/windoweffects.cpp
@@ -144,9 +144,11 @@
     }
 }
 
+#if KWINDOWSYSTEM_BUILD_DEPRECATED_SINCE(5, 67)
 void WindowEffects::markAsDashboard(WId window)
 {
     Q_UNUSED(window)
 }
+#endif
 
 }