diff --git a/src/corelib/compat/removed_api.cpp b/src/corelib/compat/removed_api.cpp
index 4cde28e088..f3f741d830 100644
--- a/src/corelib/compat/removed_api.cpp
+++ b/src/corelib/compat/removed_api.cpp
@@ -299,6 +299,20 @@ void QBasicTimer::start(int msec, Qt::TimerType timerType, QObject *obj)
 
 #include "qbuffer.h" // inline removed API
 
+#include "qdir.h"
+
+uint QDir::count() const
+{
+    return uint(count(QT6_CALL_NEW_OVERLOAD));
+}
+
+#if QT_POINTER_SIZE != 4
+QString QDir::operator[](int i) const
+{
+    return operator[](qsizetype{i});
+}
+#endif
+
 #include "qenvironmentvariables.h"
 
 bool qputenv(const char *varName, const QByteArray &value)
diff --git a/src/corelib/io/qdir.cpp b/src/corelib/io/qdir.cpp
index 3ee3088ee8..624efdafc9 100644
--- a/src/corelib/io/qdir.cpp
+++ b/src/corelib/io/qdir.cpp
@@ -1262,9 +1262,12 @@ void QDir::setSorting(SortFlags sort)
 
     Equivalent to entryList().count().
 
+    \note In Qt versions prior to 6.5, this function returned \c{uint}, not
+    \c{qsizetype}.
+
     \sa operator[](), entryList()
 */
-uint QDir::count() const
+qsizetype QDir::count(QT6_IMPL_NEW_OVERLOAD) const
 {
     const QDirPrivate* d = d_ptr.constData();
     d->initFileLists(*this);
@@ -1276,9 +1279,11 @@ uint QDir::count() const
     names. Equivalent to entryList().at(index).
     \a pos must be a valid index position in the list (i.e., 0 <= pos < count()).
 
+    \note In Qt versions prior to 6.5, \a pos was an \c{int}, not \c{qsizetype}.
+
     \sa count(), entryList()
 */
-QString QDir::operator[](int pos) const
+QString QDir::operator[](qsizetype pos) const
 {
     const QDirPrivate* d = d_ptr.constData();
     d->initFileLists(*this);
diff --git a/src/corelib/io/qdir.h b/src/corelib/io/qdir.h
index b516777fb8..32bb471af4 100644
--- a/src/corelib/io/qdir.h
+++ b/src/corelib/io/qdir.h
@@ -146,10 +146,16 @@ public:
     SortFlags sorting() const;
     void setSorting(SortFlags sort);
 
+#if QT_CORE_REMOVED_SINCE(6, 5)
     uint count() const;
+#endif
+    qsizetype count(QT6_DECL_NEW_OVERLOAD) const;
     bool isEmpty(Filters filters = Filters(AllEntries | NoDotAndDotDot)) const;
 
+#if QT_CORE_REMOVED_SINCE(6, 5) && QT_POINTER_SIZE != 4
     QString operator[](int) const;
+#endif
+    QString operator[](qsizetype) const;
 
     static QStringList nameFiltersFromString(const QString &nameFilter);