diff --git a/src/corelib/text/qbytearray.cpp b/src/corelib/text/qbytearray.cpp
index 573a36d9a04..1219b3d86db 100644
--- a/src/corelib/text/qbytearray.cpp
+++ b/src/corelib/text/qbytearray.cpp
@@ -4561,6 +4561,10 @@ QByteArray QByteArray::fromPercentEncoding(const QByteArray &input, char percent
 
     \sa toStdString(), QString::fromStdString()
 */
+QByteArray QByteArray::fromStdString(const std::string &s)
+{
+    return QByteArray(s.data(), qsizetype(s.size()));
+}
 
 /*!
     \fn std::string QByteArray::toStdString() const
@@ -4574,6 +4578,10 @@ QByteArray QByteArray::fromPercentEncoding(const QByteArray &input, char percent
 
     \sa fromStdString(), QString::toStdString()
 */
+std::string QByteArray::toStdString() const
+{
+    return std::string(data(), size_t(size()));
+}
 
 /*!
     \since 4.4
diff --git a/src/corelib/text/qbytearray.h b/src/corelib/text/qbytearray.h
index 4ee6c34baa0..a43a1a41280 100644
--- a/src/corelib/text/qbytearray.h
+++ b/src/corelib/text/qbytearray.h
@@ -430,8 +430,8 @@ public:
     void shrink_to_fit() { squeeze(); }
     iterator erase(const_iterator first, const_iterator last);
 
-    static inline QByteArray fromStdString(const std::string &s);
-    inline std::string toStdString() const;
+    static QByteArray fromStdString(const std::string &s);
+    std::string toStdString() const;
 
     inline qsizetype size() const noexcept { return d->size; }
 #if QT_DEPRECATED_SINCE(6, 4)
@@ -567,12 +567,6 @@ inline QByteArray &QByteArray::setNum(ulong n, int base)
 inline QByteArray &QByteArray::setNum(float n, char format, int precision)
 { return setNum(double(n), format, precision); }
 
-inline std::string QByteArray::toStdString() const
-{ return std::string(constData(), length()); }
-
-inline QByteArray QByteArray::fromStdString(const std::string &s)
-{ return QByteArray(s.data(), qsizetype(s.size())); }
-
 #if !defined(QT_NO_DATASTREAM) || defined(QT_BOOTSTRAPPED)
 Q_CORE_EXPORT QDataStream &operator<<(QDataStream &, const QByteArray &);
 Q_CORE_EXPORT QDataStream &operator>>(QDataStream &, QByteArray &);