diff --git a/arch/arm/include/asm/arch-sunxi/timer.h b/arch/arm/include/asm/arch-sunxi/timer.h
index 8ed383eb16..03a0684c79 100644
--- a/arch/arm/include/asm/arch-sunxi/timer.h
+++ b/arch/arm/include/asm/arch-sunxi/timer.h
@@ -67,7 +67,9 @@ struct sunxi_timer_reg {
 	struct sunxi_timer timer[6];	/* We have 6 timers */
 	u8 res2[16];
 	struct sunxi_avs avs;
+#if defined(CONFIG_SUN4I) || defined(CONFIG_SUN5I) || defined(CONFIG_SUN7I)
 	struct sunxi_wdog wdog;	/* 0x90 */
+	/* XXX the following is not accurate for sun5i/sun7i */
 	struct sunxi_64cnt cnt64;	/* 0xa0 */
 	u8 res4[0x58];
 	struct sunxi_rtc rtc;
@@ -75,6 +77,10 @@ struct sunxi_timer_reg {
 	struct sunxi_tgp tgp[4];
 	u8 res5[8];
 	u32 cpu_cfg;
+#else /* CONFIG_SUN6I || CONFIG_SUN8I || ... */
+	u8 res3[16];
+	struct sunxi_wdog wdog[5];	/* We have 5 watchdogs */
+#endif
 };
 
 #endif /* __ASSEMBLY__ */