diff --git a/drivers/mailbox/riscv-sbi-mpxy-mbox.c b/drivers/mailbox/riscv-sbi-mpxy-mbox.c
index 7c9c006b7244a5..18da9efcce405e 100644
--- a/drivers/mailbox/riscv-sbi-mpxy-mbox.c
+++ b/drivers/mailbox/riscv-sbi-mpxy-mbox.c
@@ -480,7 +480,7 @@ static void mpxy_mbox_peek_rpmi_data(struct mbox_chan *chan,
 	struct rpmi_mbox_message msg;
 	unsigned long pos = 0;
 
-	while (pos < events_data_len && (events_data_len - pos) <= sizeof(*event)) {
+	while (pos < events_data_len && (events_data_len - pos) >= sizeof(*event)) {
 		event = (struct rpmi_notification_event *)(notif->events_data + pos);
 
 		msg.type = RPMI_MBOX_MSG_TYPE_NOTIFICATION_EVENT;