diff --git a/src/UserInterface/Packet.h b/src/UserInterface/Packet.h
index 30d8a64..3c22b19 100644
--- a/src/UserInterface/Packet.h
+++ b/src/UserInterface/Packet.h
@@ -132,10 +132,6 @@ enum
 	HEADER_CG_DRAGON_SOUL_REFINE			= 205,
 	HEADER_CG_STATE_CHECKER					= 206,
 
-#ifdef __AUCTION__
-	HEADER_CG_AUCTION_CMD							= 205,
-#endif
-
 	HEADER_CG_KEY_AGREEMENT						= 0xfb, // _IMPROVED_PACKET_ENCRYPTION_
 	HEADER_CG_TIME_SYNC							= 0xfc,
 	HEADER_CG_CLIENT_VERSION					= 0xfd,
@@ -304,10 +300,6 @@ enum
 	HEADER_GC_NEWCIBN_PASSPOD_REQUEST			= 202,
 	HEADER_GC_NEWCIBN_PASSPOD_FAILURE			= 203,
 
-#ifdef __AUCTION__
-	HEADER_GC_AUCTOIN_ITEM_LIST					= 206,
-#endif 
-
 	HEADER_GC_SPECIFIC_EFFECT					= 208,
 	HEADER_GC_DRAGON_SOUL_REFINE						= 209,
 	HEADER_GC_RESPOND_CHANNELSTATUS				= 210,
@@ -2608,26 +2600,6 @@ struct TPacketKeyAgreementCompleted
 };
 #endif // _IMPROVED_PACKET_ENCRYPTION_
 
-#ifdef __AUCTION__
-// Argument의 용도는 cmd에 따라 다르다.
-typedef struct SPacketCGAuctionCmd
-{
-	uint8_t bHeader;
-	uint8_t cmd;
-	int32_t arg1;
-	int32_t arg2;
-	int32_t arg3;
-	int32_t arg4;
-} TPacketCGAuctionCmd;
-
-typedef struct SPacketGCAuctionItemListPack
-{
-	uint8_t bHeader;
-	uint8_t bNumbers;
-} TPacketGCAuctionItemListPack;
-
-#endif
-
 typedef struct SPacketGCSpecificEffect
 {
 	uint8_t header;