diff --git a/src/corelib/text/qbytearray.cpp b/src/corelib/text/qbytearray.cpp
index 4c9282df26b..09c103a0b94 100644
--- a/src/corelib/text/qbytearray.cpp
+++ b/src/corelib/text/qbytearray.cpp
@@ -4190,24 +4190,6 @@ QByteArray QByteArray::toBase64(Base64Options options) const
     \sa toUShort()
 */
 
-static char *qulltoa2(char *p, qulonglong n, int base)
-{
-#if defined(QT_CHECK_RANGE)
-    if (base < 2 || base > 36) {
-        qWarning("QByteArray::setNum: Invalid base %d", base);
-        base = 10;
-    }
-#endif
-    constexpr char b = 'a' - 10;
-    do {
-        const int c = n % base;
-        n /= base;
-        *--p = c + (c < 10 ? '0' : b);
-    } while (n);
-
-    return p;
-}
-
 /*!
     \overload
 
diff --git a/src/corelib/text/qlocale_tools.cpp b/src/corelib/text/qlocale_tools.cpp
index b6639bcb711..660216a65c1 100644
--- a/src/corelib/text/qlocale_tools.cpp
+++ b/src/corelib/text/qlocale_tools.cpp
@@ -552,6 +552,18 @@ QString qulltoa(qulonglong number, int base, const QStringView zero)
     return QString(reinterpret_cast<QChar *>(p), end - p);
 }
 
+char *qulltoa2(char *p, qulonglong n, int base)
+{
+#if defined(QT_CHECK_RANGE)
+    if (base < 2 || base > 36) {
+        qWarning("QByteArray::setNum: Invalid base %d", base);
+        base = 10;
+    }
+#endif
+    qulltoString_helper(n, base, p);
+    return p;
+}
+
 /*!
   \internal
 
diff --git a/src/corelib/text/qlocale_tools_p.h b/src/corelib/text/qlocale_tools_p.h
index 9b02403ea42..cd012e7afd3 100644
--- a/src/corelib/text/qlocale_tools_p.h
+++ b/src/corelib/text/qlocale_tools_p.h
@@ -36,6 +36,7 @@ void qt_doubleToAscii(double d, QLocaleData::DoubleForm form, int precision,
 
 [[nodiscard]] QString qulltoBasicLatin(qulonglong l, int base, bool negative);
 [[nodiscard]] QString qulltoa(qulonglong l, int base, const QStringView zero);
+[[nodiscard]] char *qulltoa2(char *p, qulonglong n, int base);
 [[nodiscard]] Q_CORE_EXPORT QString qdtoa(qreal d, int *decpt, int *sign);
 [[nodiscard]] QString qdtoBasicLatin(double d, QLocaleData::DoubleForm form,
                                      int precision, bool uppercase);