diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index 393981f..8214724 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -473,6 +473,7 @@
 }
 #endif
 
+#ifdef CONFIG_XEN_DOM0
 struct xen_device_domain_owner {
 	domid_t domain;
 	struct pci_dev *dev;
@@ -545,3 +546,4 @@
 	return 0;
 }
 EXPORT_SYMBOL_GPL(xen_unregister_device_domain_owner);
+#endif