diff --git a/src/network/access/qhttp1configuration.cpp b/src/network/access/qhttp1configuration.cpp
index 2e804d66e41..cfa929bca50 100644
--- a/src/network/access/qhttp1configuration.cpp
+++ b/src/network/access/qhttp1configuration.cpp
@@ -36,7 +36,7 @@ static_assert(sizeof(QHttp1Configuration) == sizeof(void*),
     Default constructs a QHttp1Configuration object.
 */
 QHttp1Configuration::QHttp1Configuration()
-    : data{6, {}} // QHttpNetworkConnectionPrivate::defaultHttpChannelCount
+    : u(ShortData{6, {}}) // QHttpNetworkConnectionPrivate::defaultHttpChannelCount
 {
 }
 
@@ -91,7 +91,7 @@ void QHttp1Configuration::setNumberOfConnectionsPerHost(qsizetype number)
     auto n = qt_saturate<std::uint8_t>(number);
     if (n == 0)
         return;
-    data.numConnectionsPerHost = n;
+    u.data.numConnectionsPerHost = n;
 }
 
 /*!
@@ -102,7 +102,7 @@ void QHttp1Configuration::setNumberOfConnectionsPerHost(qsizetype number)
 */
 qsizetype QHttp1Configuration::numberOfConnectionsPerHost() const
 {
-    return data.numConnectionsPerHost;
+    return u.data.numConnectionsPerHost;
 }
 
 /*!
@@ -140,7 +140,7 @@ qsizetype QHttp1Configuration::numberOfConnectionsPerHost() const
 */
 bool QHttp1Configuration::equals(const QHttp1Configuration &other) const noexcept
 {
-    return data.numConnectionsPerHost == other.data.numConnectionsPerHost;
+    return u.data.numConnectionsPerHost == other.u.data.numConnectionsPerHost;
 }
 
 /*!
@@ -148,7 +148,7 @@ bool QHttp1Configuration::equals(const QHttp1Configuration &other) const noexcep
 */
 size_t QHttp1Configuration::hash(size_t seed) const noexcept
 {
-    return qHash(data.numConnectionsPerHost, seed);
+    return qHash(u.data.numConnectionsPerHost, seed);
 }
 
 QT_END_NAMESPACE
diff --git a/src/network/access/qhttp1configuration.h b/src/network/access/qhttp1configuration.h
index 91e4554256c..4b66745f54a 100644
--- a/src/network/access/qhttp1configuration.h
+++ b/src/network/access/qhttp1configuration.h
@@ -22,7 +22,7 @@ public:
     Q_NETWORK_EXPORT QHttp1Configuration();
     Q_NETWORK_EXPORT QHttp1Configuration(const QHttp1Configuration &other);
     QHttp1Configuration(QHttp1Configuration &&other) noexcept
-        : d{std::exchange(other.d, nullptr)} {}
+        : u{other.u} { other.u.d = nullptr; }
 
     Q_NETWORK_EXPORT QHttp1Configuration &operator=(const QHttp1Configuration &other);
     QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_PURE_SWAP(QHttp1Configuration)
@@ -33,17 +33,18 @@ public:
     Q_NETWORK_EXPORT qsizetype numberOfConnectionsPerHost() const;
 
     void swap(QHttp1Configuration &other) noexcept
-    { qt_ptr_swap(d, other.d); }
+    { std::swap(u, other.u); }
 
 private:
     struct ShortData {
         std::uint8_t numConnectionsPerHost;
         char reserved[sizeof(void*) - sizeof(numConnectionsPerHost)];
     };
-    union {
+    union U {
+        U(ShortData _data) : data(_data) {}
         QHttp1ConfigurationPrivate *d;
         ShortData data;
-    };
+    } u;
 
     Q_NETWORK_EXPORT bool equals(const QHttp1Configuration &other) const noexcept;
     Q_NETWORK_EXPORT size_t hash(size_t seed) const noexcept;