diff --git a/src/corelib/text/qstring.cpp b/src/corelib/text/qstring.cpp
index 5de3043c691..9259d485c15 100644
--- a/src/corelib/text/qstring.cpp
+++ b/src/corelib/text/qstring.cpp
@@ -5389,6 +5389,12 @@ char16_t *QLatin1::convertToUnicode(char16_t *out, QLatin1StringView in) noexcep
     return std::next(out, len);
 }
 
+char *QLatin1::convertFromUnicode(char *out, QStringView in) noexcept
+{
+    const qsizetype len = in.size();
+    qt_to_latin1(reinterpret_cast<uchar *>(out), in.utf16(), len);
+    return out + len;
+}
 
 /*!
     \fn QByteArray QString::toLatin1() const
diff --git a/src/corelib/text/qstringconverter_p.h b/src/corelib/text/qstringconverter_p.h
index ce6254de0cc..edbe1b54843 100644
--- a/src/corelib/text/qstringconverter_p.h
+++ b/src/corelib/text/qstringconverter_p.h
@@ -50,11 +50,9 @@ struct QLatin1
     }
 
     static char *convertFromUnicode(char *out, QStringView in, QStringConverter::State *state) noexcept;
-    static char *convertFromUnicode(char *out, QStringView in) noexcept
-    {
-        QStringConverter::State state{QStringConverter::Flag::Stateless};
-        return convertFromUnicode(out, in, &state);
-    }
+
+    // Defined in qstring.cpp
+    static char *convertFromUnicode(char *out, QStringView in) noexcept;
 };
 
 struct QUtf8BaseTraits