diff --git a/include/configs/ZPC1900.h b/include/configs/ZPC1900.h
index 9cda3f9..8ae765c 100644
--- a/include/configs/ZPC1900.h
+++ b/include/configs/ZPC1900.h
@@ -86,6 +86,10 @@
  * GPIO pins used for bit-banged MII communications
  */
 #define MDIO_PORT		2	/* Port C */
+#define MDIO_DECLARE		volatile ioport_t *iop = ioport_addr ( \
+					(immap_t *) CONFIG_SYS_IMMR, MDIO_PORT )
+#define MDC_DECLARE		MDIO_DECLARE
+
 #define MDIO_ACTIVE		(iop->pdir |=  0x00400000)
 #define MDIO_TRISTATE		(iop->pdir &= ~0x00400000)
 #define MDIO_READ		((iop->pdat &  0x00400000) != 0)