Index: gcc/config/avr/avr.h
===================================================================
--- gcc/config/avr/avr.h        (revision 116509)
+++ gcc/config/avr/avr.h        (working copy)
@@ -94,6 +94,7 @@
 /* No data type wants to be aligned rounder than this.  */
 #define BIGGEST_ALIGNMENT 8

+#define TARGET_VTABLE_ENTRY_ALIGN 8

 #define STRICT_ALIGNMENT 0