diff --git a/src/corelib/time/qdatetime.h b/src/corelib/time/qdatetime.h
index da7a28af3cb..240fcc06328 100644
--- a/src/corelib/time/qdatetime.h
+++ b/src/corelib/time/qdatetime.h
@@ -458,7 +458,7 @@ public:
         return result.addMSecs(time.time_since_epoch().count());
     }
 
-#if QT_CONFIG(timezone)
+#if QT_CONFIG(timezone) && (__cpp_lib_chrono >= 201907L || defined(Q_QDOC))
     // zoned_time. defined in qtimezone.h
     QT_POST_CXX17_API_IN_EXPORTED_CLASS
     static QDateTime fromStdZonedTime(const std::chrono::zoned_time<
diff --git a/src/corelib/time/qtimezone.h b/src/corelib/time/qtimezone.h
index 6e7ee0bb026..4006e673e76 100644
--- a/src/corelib/time/qtimezone.h
+++ b/src/corelib/time/qtimezone.h
@@ -256,7 +256,7 @@ Q_CORE_EXPORT QDataStream &operator>>(QDataStream &ds, QTimeZone &tz);
 Q_CORE_EXPORT QDebug operator<<(QDebug dbg, const QTimeZone &tz);
 #endif
 
-#if __cpp_lib_chrono >= 201907L
+#if QT_CONFIG(timezone) && __cpp_lib_chrono >= 201907L
 // zoned_time
 template <typename> // QT_POST_CXX17_API_IN_EXPORTED_CLASS
 inline QDateTime QDateTime::fromStdZonedTime(const std::chrono::zoned_time<