4 files changed, 6 insertions, 6 deletions
diff --git a/src/corelib/json/qjsonarray.h b/src/corelib/json/qjsonarray.h
index ddba2ca78e..8d41138c97 100644
--- a/src/corelib/json/qjsonarray.h
+++ b/src/corelib/json/qjsonarray.h
@@ -133,7 +133,7 @@ public:
         typedef QJsonValueRef reference;
         typedef QJsonValueRefPtr pointer;
 
-        inline iterator() : a(Q_NULLPTR), i(0) { }
+        inline iterator() : a(nullptr), i(0) { }
         explicit inline iterator(QJsonArray *array, int index) : a(array), i(index) { }
 
         inline QJsonValueRef operator*() const { return QJsonValueRef(a, i); }
@@ -178,7 +178,7 @@ public:
         typedef QJsonValue reference;
         typedef QJsonValuePtr pointer;
 
-        inline const_iterator() : a(Q_NULLPTR), i(0) { }
+        inline const_iterator() : a(nullptr), i(0) { }
         explicit inline const_iterator(const QJsonArray *array, int index) : a(array), i(index) { }
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
         inline const_iterator(const const_iterator &o) : a(o.a), i(o.i) {} // ### Qt 6: Removed so class can be trivially-copyable
diff --git a/src/corelib/json/qjsondocument.h b/src/corelib/json/qjsondocument.h
index 4e76af21e2..e1730cf374 100644
--- a/src/corelib/json/qjsondocument.h
+++ b/src/corelib/json/qjsondocument.h
@@ -129,7 +129,7 @@ public:
         Compact
     };
 
-    static QJsonDocument fromJson(const QByteArray &json, QJsonParseError *error = Q_NULLPTR);
+    static QJsonDocument fromJson(const QByteArray &json, QJsonParseError *error = nullptr);
 
 #ifdef Q_QDOC
     QByteArray toJson(JsonFormat format = Indented) const;
diff --git a/src/corelib/json/qjsonobject.h b/src/corelib/json/qjsonobject.h
index c77e2164a8..610bce694c 100644
--- a/src/corelib/json/qjsonobject.h
+++ b/src/corelib/json/qjsonobject.h
@@ -135,7 +135,7 @@ public:
         typedef QJsonValueRef reference;
         typedef QJsonValuePtr pointer;
 
-        Q_DECL_CONSTEXPR inline iterator() : o(Q_NULLPTR), i(0) {}
+        Q_DECL_CONSTEXPR inline iterator() : o(nullptr), i(0) {}
         Q_DECL_CONSTEXPR inline iterator(QJsonObject *obj, int index) : o(obj), i(index) {}
 
         inline QString key() const { return o->keyAt(i); }
@@ -178,7 +178,7 @@ public:
         typedef QJsonValue reference;
         typedef QJsonValuePtr pointer;
 
-        Q_DECL_CONSTEXPR inline const_iterator() : o(Q_NULLPTR), i(0) {}
+        Q_DECL_CONSTEXPR inline const_iterator() : o(nullptr), i(0) {}
         Q_DECL_CONSTEXPR inline const_iterator(const QJsonObject *obj, int index)
             : o(obj), i(index) {}
         inline const_iterator(const iterator &other)
diff --git a/src/corelib/json/qjsonvalue.h b/src/corelib/json/qjsonvalue.h
index 5d5ec72605..96538ebbf9 100644
--- a/src/corelib/json/qjsonvalue.h
+++ b/src/corelib/json/qjsonvalue.h
@@ -82,7 +82,7 @@ public:
     QJsonValue(QLatin1String s);
 #ifndef QT_NO_CAST_FROM_ASCII
     inline QT_ASCII_CAST_WARN QJsonValue(const char *s)
-        : d(Q_NULLPTR), t(String) { stringDataFromQStringHelper(QString::fromUtf8(s)); }
+        : d(nullptr), t(String) { stringDataFromQStringHelper(QString::fromUtf8(s)); }
 #endif
     QJsonValue(const QJsonArray &a);
     QJsonValue(const QJsonObject &o);