diff --git a/src/plugins/projectexplorer/projectexplorer.cpp b/src/plugins/projectexplorer/projectexplorer.cpp
index 79171dfd0726f8188e86f5d4888466cdaa9d6448..a50f5e753f2b4436ed4b3148f8441c04801fef32 100644
--- a/src/plugins/projectexplorer/projectexplorer.cpp
+++ b/src/plugins/projectexplorer/projectexplorer.cpp
@@ -1418,6 +1418,7 @@ void ProjectExplorerPlugin::updateWelcomePage()
 
 void ProjectExplorerPlugin::currentModeChanged(Core::IMode *mode, Core::IMode *oldMode)
 {
+    Q_UNUSED(oldMode);
     if (mode && mode->id() == Core::Id(Core::Constants::MODE_WELCOME).toString())
         updateWelcomePage();
 }