diff --git a/src/corelib/time/qcalendar.cpp b/src/corelib/time/qcalendar.cpp
index a6801fe725..5eaecedbbd 100644
--- a/src/corelib/time/qcalendar.cpp
+++ b/src/corelib/time/qcalendar.cpp
@@ -25,9 +25,8 @@
 
 QT_BEGIN_NAMESPACE
 
-namespace {
-
-struct CaseInsensitiveAnyStringViewLessThan {
+struct QCalendarRegistryCaseInsensitiveAnyStringViewLessThan
+{
     struct is_transparent {};
     bool operator()(QAnyStringView lhs, QAnyStringView rhs) const
     {
@@ -35,8 +34,6 @@ struct CaseInsensitiveAnyStringViewLessThan {
     }
 };
 
-} // unnamed namespace
-
 namespace QtPrivate {
 
 /*
@@ -70,7 +67,7 @@ class QCalendarRegistry
     */
     QFlatMap<
         QString, QCalendarBackend *,
-        CaseInsensitiveAnyStringViewLessThan,
+        QCalendarRegistryCaseInsensitiveAnyStringViewLessThan,
         QStringList,
         std::vector<QCalendarBackend *>
     > byName;