diff --git a/src/network/access/qnetworkrequest.cpp b/src/network/access/qnetworkrequest.cpp
index 3dc8dc069fd..cbfd1739abd 100644
--- a/src/network/access/qnetworkrequest.cpp
+++ b/src/network/access/qnetworkrequest.cpp
@@ -30,6 +30,8 @@ QT_BEGIN_NAMESPACE
 using namespace Qt::StringLiterals;
 using namespace std::chrono_literals;
 
+constexpr std::chrono::milliseconds QNetworkRequest::DefaultTransferTimeout;
+
 QT_IMPL_METATYPE_EXTERN(QNetworkRequest)
 QT_IMPL_METATYPE_EXTERN_TAGGED(QNetworkRequest::RedirectPolicy, QNetworkRequest__RedirectPolicy)