diff --git a/samples/client/petstore/qt5cpp/client/SWGHelpers.cpp b/samples/client/petstore/qt5cpp/client/SWGHelpers.cpp
index 83b0c7f66b7..5b7dd31fb98 100644
--- a/samples/client/petstore/qt5cpp/client/SWGHelpers.cpp
+++ b/samples/client/petstore/qt5cpp/client/SWGHelpers.cpp
@@ -16,6 +16,7 @@
 #include <QDebug>
 #include <QJsonArray>
 #include <QJsonValue>
+#include <QDateTime>
 
 namespace Swagger {