1 files changed, 4 insertions, 1 deletions

diff --git a/src/TrayIcon.cpp b/src/TrayIcon.cpp

index 98a1d242..701f1249 100644
--- a/src/TrayIcon.cpp
+++ b/src/TrayIcon.cpp
@@ -69,7 +69,10 @@ MsgCountComposedIcon::clone() const
 }
 
 QList<QSize>
-MsgCountComposedIcon::availableSizes(QIcon::Mode mode, QIcon::State state) const
+MsgCountComposedIcon::availableSizes(QIcon::Mode mode, QIcon::State state)
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+  const
+#endif
 {
     Q_UNUSED(mode);
     Q_UNUSED(state);