diff -Naur pciutils-2.2.0.orig/lib/access.c pciutils-2.2.0/lib/access.c
--- pciutils-2.2.0.orig/lib/access.c	2005-09-22 14:43:13.000000000 +0200
+++ pciutils-2.2.0/lib/access.c	2005-09-22 14:48:27.000000000 +0200
@@ -183,7 +183,8 @@
 void
 pci_scan_bus(struct pci_access *a)
 {
-  a->methods->scan(a);
+  if (a->methods)
+    a->methods->scan(a);
 }
 
 struct pci_dev *