diff -Naurp gcc/config/avr/avr.h gcc/config/avr/avr.h
--- gcc/config/avr/avr.h	2012-11-16 13:43:25.000000000 +0530
+++ gcc/config/avr/avr.h	2012-11-16 14:12:32.000000000 +0530
@@ -245,8 +245,8 @@ enum
 
 #define EMPTY_FIELD_BOUNDARY 8
 
-/* No data type wants to be aligned rounder than this.  */
-#define BIGGEST_ALIGNMENT 8
+/* For Xmega USB buffers */
+#define BIGGEST_ALIGNMENT 16
 
 #define TARGET_VTABLE_ENTRY_ALIGN 8