diff --git a/src/corelib/io/qtextstream.cpp b/src/corelib/io/qtextstream.cpp
index b8db23329a2..4fdb1505ffc 100644
--- a/src/corelib/io/qtextstream.cpp
+++ b/src/corelib/io/qtextstream.cpp
@@ -2644,6 +2644,7 @@ QTextStream &QTextStream::operator<<(const char *string)
 {
     Q_D(QTextStream);
     CHECK_VALID_STREAM(*this);
+    // ### Qt6: consider changing to UTF-8
     d->putString(QLatin1String(string));
     return *this;
 }