diff --git a/board/sipeed/maix/maix.c b/board/sipeed/maix/maix.c
index a218278..79e492f 100644
--- a/board/sipeed/maix/maix.c
+++ b/board/sipeed/maix/maix.c
@@ -11,7 +11,7 @@
 
 phys_size_t get_effective_memsize(void)
 {
-	return CONFIG_SYS_SDRAM_SIZE;
+	return CFG_SYS_SDRAM_SIZE;
 }
 
 static int sram_init(void)