diff --git a/src/plugins/qmlprofiler/qmlprofilertool.h b/src/plugins/qmlprofiler/qmlprofilertool.h
index bb3f2b1cec6..fa9ba2e9684 100644
--- a/src/plugins/qmlprofiler/qmlprofilertool.h
+++ b/src/plugins/qmlprofiler/qmlprofilertool.h
@@ -36,7 +36,9 @@
 #include <analyzerbase/ianalyzertool.h>
 #include <analyzerbase/ianalyzerengine.h>
 
+QT_BEGIN_NAMESPACE
 class QMessageBox;
+QT_END_NAMESPACE
 
 namespace QmlProfiler {
 namespace Internal {