diff --git a/drivers/isdn/hardware/mISDN/Kconfig b/drivers/isdn/hardware/mISDN/Kconfig
index 14793480c453e0e915a4188dc697af6e9e5b416e..9cd5f5f62280042f870f606a8e2da8d43fe2c8cc 100644
--- a/drivers/isdn/hardware/mISDN/Kconfig
+++ b/drivers/isdn/hardware/mISDN/Kconfig
@@ -7,6 +7,7 @@ config MISDN_HFCPCI
 	tristate "Support for HFC PCI cards"
 	depends on MISDN
 	depends on PCI
+	depends on VIRT_TO_BUS
 	help
 	  Enable support for cards with Cologne Chip AG's
           HFC PCI chip.