diff --git a/osu.Game/Online/Chat/MessageNotifier.cs b/osu.Game/Online/Chat/MessageNotifier.cs
index 65aac723da..b91cf06847 100644
--- a/osu.Game/Online/Chat/MessageNotifier.cs
+++ b/osu.Game/Online/Chat/MessageNotifier.cs
@@ -127,6 +127,8 @@ namespace osu.Game.Online.Chat
             if (!notifyOnPrivateMessage.Value || channel.Type != ChannelType.PM)
                 return false;
 
+            (host as DesktopGameHost)?.FlashWindow();
+
             notifications.Post(new PrivateMessageNotification(message, channel));
             return true;
         }
@@ -135,6 +137,8 @@ namespace osu.Game.Online.Chat
         {
             if (!notifyOnUsername.Value || !CheckContainsUsername(message.Content, localUser.Value.Username)) return;
 
+            (host as DesktopGameHost)?.FlashWindow();
+
             notifications.Post(new MentionNotification(message, channel));
         }