diff --git a/samples/blackgui2/main.cpp b/samples/blackgui2/main.cpp
index db6a026d1..3808e4319 100644
--- a/samples/blackgui2/main.cpp
+++ b/samples/blackgui2/main.cpp
@@ -51,6 +51,7 @@ int main(int argc, char *argv[])
     intro.close();
 
     // Window
+    Q_UNUSED(coreMode);
     CDockWindow dockWindow(windowMode);
     dockWindow.show();
     return a.exec();