1 files changed, 8 insertions, 0 deletions
diff --git a/src/corelib/tools/qstringbuilder.h b/src/corelib/tools/qstringbuilder.h
index f0670999d7..befa40081c 100644
--- a/src/corelib/tools/qstringbuilder.h
+++ b/src/corelib/tools/qstringbuilder.h
@@ -143,12 +143,16 @@ class QStringBuilder <QString, QString> : public QStringBuilderBase<QStringBuild
 {
     public:
         QStringBuilder(const QString &a_, const QString &b_) : a(a_), b(b_) {}
+        QStringBuilder(const QStringBuilder &other) : a(other.a), b(other.b) {}
 
         operator QString() const
         { QString r(a); r += b; return r; }
 
         const QString &a;
         const QString &b;
+
+    private:
+        QStringBuilder &operator=(const QStringBuilder &) Q_DECL_EQ_DELETE;
 };
 
 template <>
@@ -156,12 +160,16 @@ class QStringBuilder <QByteArray, QByteArray> : public QStringBuilderBase<QStrin
 {
     public:
         QStringBuilder(const QByteArray &a_, const QByteArray &b_) : a(a_), b(b_) {}
+        QStringBuilder(const QStringBuilder &other) : a(other.a), b(other.b) {}
 
         operator QByteArray() const
         { QByteArray r(a); r += b; return r; }
 
         const QByteArray &a;
         const QByteArray &b;
+
+    private:
+        QStringBuilder &operator=(const QStringBuilder &) Q_DECL_EQ_DELETE;
 };