diff --git a/drivers/mailbox/bcm2835-mailbox.c b/drivers/mailbox/bcm2835-mailbox.c
index 4b13268..0b47dd4 100644
--- a/drivers/mailbox/bcm2835-mailbox.c
+++ b/drivers/mailbox/bcm2835-mailbox.c
@@ -49,6 +49,7 @@
 #define MAIL0_STA	(ARM_0_MAIL0 + 0x18)
 #define MAIL0_CNF	(ARM_0_MAIL0 + 0x1C)
 #define MAIL1_WRT	(ARM_0_MAIL1 + 0x00)
+#define MAIL1_STA	(ARM_0_MAIL1 + 0x18)
 
 /* Status register: FIFO state. */
 #define ARM_MS_FULL		BIT(31)
@@ -117,7 +118,7 @@
 	bool ret;
 
 	spin_lock(&mbox->lock);
-	ret = !(readl(mbox->regs + MAIL0_STA) & ARM_MS_FULL);
+	ret = !(readl(mbox->regs + MAIL1_STA) & ARM_MS_FULL);
 	spin_unlock(&mbox->lock);
 	return ret;
 }