diff --git a/athcool/scanpci.c b/athcool/scanpci.c

index 627c519..5bac12d 100644

--- a/athcool/scanpci.c

+++ b/athcool/scanpci.c

@@ -11,8 +11,8 @@

 #define	die	printf

-struct pci_filter	filter;

-struct pci_access	*pacc;

+extern struct pci_filter	filter;

+extern struct pci_access	*pacc;

 static int		show_hex = 0;

 static struct device	*scan_device( struct pci_dev *p )