diff --git a/config/qt.m4 b/config/qt.m4
index 7e7ffd6df2..96810bfc9b 100644
--- a/config/qt.m4
+++ b/config/qt.m4
@@ -379,6 +379,10 @@ AC_DEFUN([QT6_QMAKE_CONFIG],
 [
 	dnl Use first suitable qmake in PATH
 	AC_CHECK_PROGS([QT_QMAKE], [qmake-qt6 qmake6], [qmake], $PATH)
+	case ${host} in
+	*mingw*) ;;
+	*) QT_QMAKE="env LC_ALL=C.UTF-8 $QT_QMAKE" ;;
+	esac
 	AC_MSG_CHECKING([for Qt6])
 	qtver=`$QT_QMAKE -v | grep -o "Qt version ."`
 	if test "$qtver" = "Qt version 6"; then
diff --git a/status.24x b/status.24x
index 702f13f5b8..cb0810c0f2 100644
--- a/status.24x
+++ b/status.24x
@@ -35,6 +35,7 @@ What's new
 
 * BUILD/INSTALLATION
 
+- Avoid bogus warnings when configuring for Qt6.