diff --git a/include/asm-powerpc/topology.h b/include/asm-powerpc/topology.h
index 9fe7894..50c0140 100644
--- a/include/asm-powerpc/topology.h
+++ b/include/asm-powerpc/topology.h
@@ -32,7 +32,14 @@
 int of_node_to_nid(struct device_node *device);
 
 struct pci_bus;
+#ifdef CONFIG_PCI
 extern int pcibus_to_node(struct pci_bus *bus);
+#else
+static inline int pcibus_to_node(struct pci_bus *bus)
+{
+	return -1;
+}
+#endif
 
 #define pcibus_to_cpumask(bus)	(pcibus_to_node(bus) == -1 ? \
 					CPU_MASK_ALL : \