diff --git a/src/core/codecs/qtextcodec.cpp b/src/core/codecs/qtextcodec.cpp
index 0865e72d7..84461814d 100644
--- a/src/core/codecs/qtextcodec.cpp
+++ b/src/core/codecs/qtextcodec.cpp
@@ -1399,8 +1399,16 @@ Q_GLOBAL_STATIC(QTextCodecCleanup, qGlobalQTextCodec)
 /*!
     \internal
 */
-QTextCodec::QTextCodec()
-    : d_ptr(nullptr)
+QTextCodec::QTextCodec(const QByteArray &codec)
+    : d_ptr(new QTextCodecPrivate(codec))
+{
+}
+
+/*!
+    \internal
+*/
+QTextCodec::QTextCodec(const int codec)
+    : d_ptr(new QTextCodecPrivate(codec))
 {
 }
 
@@ -1447,8 +1455,7 @@ QTextCodec *QTextCodec::codecForName(const QByteArray &name)
 #ifndef QT_NO_THREAD
             QMutexLocker locker(textCodecsMutex());
 #endif
-            QTextCodec* newcodec = new QTextCodec();
-            newcodec->d_ptr = new QTextCodecPrivate(codec);
+            QTextCodec* newcodec = new QTextCodec(codec);
             qGlobalQTextCodec()->append(newcodec);
             return newcodec;
         }
@@ -1481,8 +1488,7 @@ QTextCodec* QTextCodec::codecForMib(int mib)
 #ifndef QT_NO_THREAD
             QMutexLocker locker(textCodecsMutex());
 #endif
-            QTextCodec* newcodec = new QTextCodec();
-            newcodec->d_ptr = new QTextCodecPrivate(codec);
+            QTextCodec* newcodec = new QTextCodec(codec);
             qGlobalQTextCodec()->append(newcodec);
             return newcodec;
         }
diff --git a/src/core/codecs/qtextcodec.h b/src/core/codecs/qtextcodec.h
index a5ad73161..48406d4b1 100644
--- a/src/core/codecs/qtextcodec.h
+++ b/src/core/codecs/qtextcodec.h
@@ -114,12 +114,13 @@ public:
 private:
     Q_DISABLE_COPY(QTextCodec);
 
-    QTextCodec();
+    QTextCodec(const QByteArray &codec);
+    QTextCodec(const int codec);
     ~QTextCodec();
 
     friend class QTextCodecCleanup;
 
-    QTextCodecPrivate* d_ptr;
+    QTextCodecPrivate* const d_ptr;
 };
 
 #endif // QT_NO_TEXTCODEC