diff --git a/arch/arm/mach-sunxi/dram_sunxi_dw.c b/arch/arm/mach-sunxi/dram_sunxi_dw.c
index a5706423cb..bd606ccc65 100644
--- a/arch/arm/mach-sunxi/dram_sunxi_dw.c
+++ b/arch/arm/mach-sunxi/dram_sunxi_dw.c
@@ -686,7 +686,7 @@ unsigned long sunxi_dram_init(void)
 			(struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE;
 
 	struct dram_para para = {
-		.dual_rank = 0,
+		.dual_rank = 1,
 		.bus_full_width = 1,
 		.row_bits = 15,
 		.bank_bits = 3,
@@ -719,6 +719,8 @@ unsigned long sunxi_dram_init(void)
 	uint16_t socid = SOCID_H3;
 #elif defined(CONFIG_MACH_SUN8I_R40)
 	uint16_t socid = SOCID_R40;
+	/* Currently we cannot support R40 with dual rank memory */
+	para.dual_rank = 0;
 #elif defined(CONFIG_MACH_SUN50I)
 	uint16_t socid = SOCID_A64;
 #elif defined(CONFIG_MACH_SUN50I_H5)