diff --git a/src/emu/cpu/avr8/avr8.h b/src/emu/cpu/avr8/avr8.h
index dd85eff150a..2384c585804 100644
--- a/src/emu/cpu/avr8/avr8.h
+++ b/src/emu/cpu/avr8/avr8.h
@@ -708,11 +708,11 @@ enum
 	//0x11D: Reserved
 	//0x11E: Reserved
 	//0x11F: Reserved
-	AVR8_REGIDX_TCCR5A,
+	AVR8_REGIDX_TCCR5A = 0x120,
 	AVR8_REGIDX_TCCR5B,
 	AVR8_REGIDX_TCCR5C,
 	//0x123: Reserved
-	AVR8_REGIDX_TCNT5L,
+	AVR8_REGIDX_TCNT5L = 0x124,
 	AVR8_REGIDX_TCNT5H,
 	AVR8_REGIDX_ICR5L,
 	AVR8_REGIDX_ICR5H,
@@ -724,11 +724,11 @@ enum
 	AVR8_REGIDX_OCR5CH,
 	//0x12E: Reserved
 	//0x12F: Reserved
-	AVR8_REGIDX_UCSR3A,
+	AVR8_REGIDX_UCSR3A = 0x130,
 	AVR8_REGIDX_UCSR3B,
 	AVR8_REGIDX_UCSR3C,
 	//0x133: Reserved
-	AVR8_REGIDX_UBRR3L,
+	AVR8_REGIDX_UBRR3L = 0x134,
 	AVR8_REGIDX_UBRR3H,
 	AVR8_REGIDX_UDR3,
 	//0x137: Reserved