diff --git a/src/qml/qml/qqmlengine.cpp b/src/qml/qml/qqmlengine.cpp
index 18ae649091..e6239f0081 100644
--- a/src/qml/qml/qqmlengine.cpp
+++ b/src/qml/qml/qqmlengine.cpp
@@ -1443,6 +1443,8 @@ QQmlDebuggingEnabler::QQmlDebuggingEnabler(bool printWarning)
         qDebug("QML debugging is enabled. Only use this in a safe environment.");
     }
     QQmlEnginePrivate::qml_debugging_enabled = true;
+#else
+    Q_UNUSED(printWarning);
 #endif
 }