diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 14afa4f24424..75472cf734de 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -205,6 +205,7 @@ config MDIO_BUS_MUX_MMIOREG
 
 config MDIO_BCM_UNIMAC
 	tristate "Broadcom UniMAC MDIO bus controller"
+	depends on HAS_IOMEM
 	help
 	  This module provides a driver for the Broadcom UniMAC MDIO busses.
 	  This hardware can be found in the Broadcom GENET Ethernet MAC