diff --git a/board/nuvoton/arbel_evb/arbel_evb.c b/board/nuvoton/arbel_evb/arbel_evb.c
index 1f51921..55e93a7 100644
--- a/board/nuvoton/arbel_evb/arbel_evb.c
+++ b/board/nuvoton/arbel_evb/arbel_evb.c
@@ -59,17 +59,21 @@
 
 int dram_init_banksize(void)
 {
+	phys_size_t ram_size = gd->ram_size;
 
 	gd->bd->bi_dram[0].start = 0;
 
-	switch (gd->ram_size) {
+	#if defined(CONFIG_SYS_MEM_TOP_HIDE)
+		ram_size += CONFIG_SYS_MEM_TOP_HIDE;
+	#endif
+	switch (ram_size) {
 	case DRAM_512MB_ECC_SIZE:
 	case DRAM_512MB_SIZE:
 	case DRAM_1GB_ECC_SIZE:
 	case DRAM_1GB_SIZE:
 	case DRAM_2GB_ECC_SIZE:
 	case DRAM_2GB_SIZE:
-		gd->bd->bi_dram[0].size = gd->ram_size;
+		gd->bd->bi_dram[0].size = ram_size;
 		gd->bd->bi_dram[1].start = 0;
 		gd->bd->bi_dram[1].size = 0;
 		break;