diff --git a/include/configs/atc.h b/include/configs/atc.h
index 4f30847..0e968b1 100644
--- a/include/configs/atc.h
+++ b/include/configs/atc.h
@@ -248,6 +248,7 @@
 
 #define	CONFIG_PCI
 #define	CONFIG_PCI_PNP
+#define	CFG_PCI_MSTR_IO_BUS	0x00000000	/* PCI base   */
 
 #if 1
 /* environment is in Flash */