diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index cccda99..57d972f 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -52,6 +52,7 @@
 
 config UCB1400_CORE
 	tristate "Philips UCB1400 Core driver"
+	depends on AC97_BUS
 	help
 	  This enables support for the Philips UCB1400 core functions.
 	  The UCB1400 is an AC97 audio codec.