diff --git a/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_end.h b/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_end.h
index 8a5951fca7..a23febe4df 100644
--- a/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_end.h
+++ b/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_end.h
@@ -26,3 +26,8 @@
 	;
 	#pragma pack()
 #endif
+
+
+#ifdef __CC_ARM
+	;
+#endif
diff --git a/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_start.h b/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_start.h
index efa41a0a4d..49a4dc9f61 100644
--- a/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_start.h
+++ b/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_start.h
@@ -27,3 +27,8 @@
 #ifdef __ICCARM__
 	#pragma pack(1)
 #endif
+
+#ifdef __CC_ARM
+	__packed
+#endif
+
diff --git a/Demo/Common/ethernet/FreeTCPIP/net/uip.h b/Demo/Common/ethernet/FreeTCPIP/net/uip.h
index 00ae035a64..3cfad7bef0 100644
--- a/Demo/Common/ethernet/FreeTCPIP/net/uip.h
+++ b/Demo/Common/ethernet/FreeTCPIP/net/uip.h
@@ -69,12 +69,14 @@
 
 	typedef uip_ip6addr_t	uip_ipaddr_t;
 #else /* UIP_CONF_IPV6 */
-	typedef union			uip_ip4addr_t
-	{
-		u8_t	u8[4];	/* Initializer, must come first!!! */
-		u16_t	u16[2];
-	} uip_ip4addr_t;
-	typedef uip_ip4addr_t	uip_ipaddr_t;
+	#include "pack_struct_start.h"
+		typedef union			uip_ip4addr_t
+		{
+			u8_t	u8[4];	/* Initializer, must come first!!! */
+			u16_t	u16[2];
+		} uip_ip4addr_t;
+		typedef uip_ip4addr_t	uip_ipaddr_t
+	#include "pack_struct_end.h"
 #endif /* UIP_CONF_IPV6 */
 
 /*---------------------------------------------------------------------------*/
diff --git a/Demo/Common/ethernet/FreeTCPIP/net/uip_arp.h b/Demo/Common/ethernet/FreeTCPIP/net/uip_arp.h
index 6aec6ad7d7..e04d353053 100644
--- a/Demo/Common/ethernet/FreeTCPIP/net/uip_arp.h
+++ b/Demo/Common/ethernet/FreeTCPIP/net/uip_arp.h
@@ -146,4 +146,4 @@ void	uip_arp_timer( void );
 #endif /* __UIP_ARP_H__ */
 
 	/** @} */
-	
\ No newline at end of file
+