diff --git a/board/kontron/sl-mx8mm/spl.c b/board/kontron/sl-mx8mm/spl.c
index 3a919d0..b493734 100644
--- a/board/kontron/sl-mx8mm/spl.c
+++ b/board/kontron/sl-mx8mm/spl.c
@@ -106,7 +106,7 @@
 	}
 
 	gd->ram_size = size;
-	writel(size, M4_BOOTROM_BASE_ADDR);
+	writel(size, MCU_BOOTROM_BASE_ADDR);
 }
 
 int do_board_detect(void)