diff --git a/src/corelib/text/qlocale.cpp b/src/corelib/text/qlocale.cpp
index 536c5c3be5..85df96c7d8 100644
--- a/src/corelib/text/qlocale.cpp
+++ b/src/corelib/text/qlocale.cpp
@@ -668,7 +668,7 @@ QString qt_readEscapedFormatString(QStringView format, int *idx)
     qt_repeatCount(u"aab"); // == 2
     \endcode
 */
-int qt_repeatCount(QStringView s)
+qsizetype qt_repeatCount(QStringView s)
 {
     if (s.isEmpty())
         return 0;
@@ -676,7 +676,7 @@ int qt_repeatCount(QStringView s)
     qsizetype j = 1;
     while (j < s.size() && s.at(j) == c)
         ++j;
-    return int(j);
+    return j;
 }
 
 Q_CONSTINIT static const QLocaleData *default_data = nullptr;
@@ -3333,7 +3333,7 @@ QString QCalendarBackend::dateTimeToString(QStringView format, const QDateTime &
         }
 
         const QChar c = format.at(i);
-        int repeat = qt_repeatCount(format.mid(i));
+        qsizetype repeat = qt_repeatCount(format.mid(i));
         bool used = false;
         if (formatDate) {
             switch (c.unicode()) {
diff --git a/src/corelib/text/qlocale_mac.mm b/src/corelib/text/qlocale_mac.mm
index 67f8039309..7ed7c34f3b 100644
--- a/src/corelib/text/qlocale_mac.mm
+++ b/src/corelib/text/qlocale_mac.mm
@@ -267,7 +267,7 @@ static QVariant macToQtFormat(QStringView sys_fmt)
         }
 
         QChar c = sys_fmt.at(i);
-        int repeat = qt_repeatCount(sys_fmt.mid(i));
+        qsizetype repeat = qt_repeatCount(sys_fmt.mid(i));
 
         switch (c.unicode()) {
             // Qt does not support the following options
diff --git a/src/corelib/text/qlocale_p.h b/src/corelib/text/qlocale_p.h
index e00b3c78bd..a2a48b9290 100644
--- a/src/corelib/text/qlocale_p.h
+++ b/src/corelib/text/qlocale_p.h
@@ -479,7 +479,7 @@ inline char QLocaleData::numericToCLocale(QStringView in) const
 QString qt_readEscapedFormatString(QStringView format, int *idx);
 [[nodiscard]] bool qt_splitLocaleName(QStringView name, QStringView *lang = nullptr,
                                       QStringView *script = nullptr, QStringView *cntry = nullptr);
-[[nodiscard]] int qt_repeatCount(QStringView s);
+[[nodiscard]] qsizetype qt_repeatCount(QStringView s);
 
 enum { AsciiSpaceMask = (1u << (' ' - 1)) |
                         (1u << ('\t' - 1)) |   // 9: HT - horizontal tab
diff --git a/src/corelib/text/qlocale_win.cpp b/src/corelib/text/qlocale_win.cpp
index f97d910451..f67965539b 100644
--- a/src/corelib/text/qlocale_win.cpp
+++ b/src/corelib/text/qlocale_win.cpp
@@ -729,7 +729,7 @@ QString QSystemLocalePrivate::winToQtFormat(QStringView sys_fmt)
         }
 
         QChar c = sys_fmt.at(i);
-        int repeat = qt_repeatCount(sys_fmt.mid(i));
+        qsizetype repeat = qt_repeatCount(sys_fmt.mid(i));
 
         switch (c.unicode()) {
             // Date