diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig
index 84b0a2d74d60b7b1761fd2be9632aa28869d06a2..4a418d2f656489d728b97767b95e1f99ac778681 100644
--- a/drivers/mailbox/Kconfig
+++ b/drivers/mailbox/Kconfig
@@ -56,6 +56,7 @@ config PCC
 
 config ALTERA_MBOX
 	tristate "Altera Mailbox"
+	depends on HAS_IOMEM
 	help
 	  An implementation of the Altera Mailbox soft core. It is used
 	  to send message between processors. Say Y here if you want to use the