diff --git a/plat/allwinner/sun50i_h6/include/sunxi_mmap.h b/plat/allwinner/sun50i_h6/include/sunxi_mmap.h
index 58216d8..43133be 100644
--- a/plat/allwinner/sun50i_h6/include/sunxi_mmap.h
+++ b/plat/allwinner/sun50i_h6/include/sunxi_mmap.h
@@ -59,5 +59,6 @@
 #define SUNXI_R_RSB_BASE		0x07083000
 #define SUNXI_R_UART_BASE		0x07080000
 #define SUNXI_R_PIO_BASE		0x07022000
+#define SUNXI_CPUSUBSYS_BASE		0x08100000
 
 #endif /* SUNXI_MMAP_H */