diff --git a/src/sql/kernel/qsqlresult.cpp b/src/sql/kernel/qsqlresult.cpp
index 9d33f38188..51faf7007f 100644
--- a/src/sql/kernel/qsqlresult.cpp
+++ b/src/sql/kernel/qsqlresult.cpp
@@ -225,6 +225,17 @@ QSqlResult::QSqlResult(const QSqlDriver *db)
         setNumericalPrecisionPolicy(d->sqldriver->numericalPrecisionPolicy());
 }
 
+/*!  \internal
+*/
+QSqlResult::QSqlResult(QSqlResultPrivate &dd, const QSqlDriver *db)
+{
+    d = ⅆ
+    d->q_ptr = this;
+    d->sqldriver = const_cast<QSqlDriver *>(db);
+    if (d->sqldriver)
+        setNumericalPrecisionPolicy(d->sqldriver->numericalPrecisionPolicy());
+}
+
 /*!
     Destroys the object and frees any allocated resources.
 */
diff --git a/src/sql/kernel/qsqlresult.h b/src/sql/kernel/qsqlresult.h
index 649e3587ab..7252d69460 100644
--- a/src/sql/kernel/qsqlresult.h
+++ b/src/sql/kernel/qsqlresult.h
@@ -74,6 +74,7 @@ protected:
     };
 
     explicit QSqlResult(const QSqlDriver * db);
+    QSqlResult(QSqlResultPrivate &dd, const QSqlDriver *db);
     int at() const;
     QString lastQuery() const;
     QSqlError lastError() const;