diff --git a/arch/arm/mach-sunxi/dram_helpers.c b/arch/arm/mach-sunxi/dram_helpers.c
index 239ab421a8b..470d26bd9c9 100644
--- a/arch/arm/mach-sunxi/dram_helpers.c
+++ b/arch/arm/mach-sunxi/dram_helpers.c
@@ -31,7 +31,9 @@ bool mctl_mem_matches(u32 offset)
 	/* Try to write different values to RAM at two addresses */
 	writel(0, CONFIG_SYS_SDRAM_BASE);
 	writel(0xaa55aa55, (ulong)CONFIG_SYS_SDRAM_BASE + offset);
-	dsb();
+	/* Make sure values are written and that we don't get a cached
+	 * value back. */
+	flush_dcache_all();
 	/* Check if the same value is actually observed when reading back */
 	return readl(CONFIG_SYS_SDRAM_BASE) ==
 	       readl((ulong)CONFIG_SYS_SDRAM_BASE + offset);