diff --git a/src/server/game/Server/Packets/CombatLogPackets.h b/src/server/game/Server/Packets/CombatLogPackets.h
index 74d9a37b62e..21ee16ff54a 100644
--- a/src/server/game/Server/Packets/CombatLogPackets.h
+++ b/src/server/game/Server/Packets/CombatLogPackets.h
@@ -20,6 +20,7 @@
 
 #include "Packet.h"
 #include "ObjectGuid.h"
+#include "Optional.h"
 
 namespace WorldPackets
 {