diff --git a/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_end.h b/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_end.h
index e92ed3fb5..ed4523e48 100644
--- a/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_end.h
+++ b/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_end.h
@@ -1,7 +1,19 @@
 #ifdef __GNUC__
-__attribute__( (packed) );
+	__attribute__( (packed) );
 #endif
-#ifdef __RENESAS__
-;
-#pragma unpack
+
+#ifdef _SH
+	#ifdef __RENESAS__
+		;
+		#pragma unpack
+	#endif
 #endif
+
+#ifdef __RX
+	#ifdef __RENESAS__
+		;
+		/* Nothing to do. */
+	#endif
+#endif
+
+
diff --git a/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_start.h b/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_start.h
index 4c08937a5..2281682aa 100644
--- a/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_start.h
+++ b/Demo/Common/ethernet/FreeTCPIP/net/pack_struct_start.h
@@ -3,6 +3,19 @@
 /* Nothing to do here. */
 ;
 #endif
-#ifdef __RENESAS__
-#pragma pack 1
+
+/* Used by SH2A port. */
+#ifdef _SH
+	#ifdef __RENESAS__
+		#pragma pack 1
+	#endif
 #endif
+
+
+#ifdef __RX
+	#ifdef __RENESAS__
+		/* Nothing to do. */
+	#endif
+#endif
+
+