diff --git a/drivers/dahdi/wcxb.c b/drivers/dahdi/wcxb.c
index 6266523..a418447 100644
--- a/drivers/dahdi/wcxb.c
+++ b/drivers/dahdi/wcxb.c
@@ -122,11 +122,15 @@ struct wcxb_meta_desc {
 
 static inline bool wcxb_is_pcie(const struct wcxb *xb)
 {
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 33)
+	return pci_is_pcie(xb->pdev);
+#else
 #ifndef WCXB_PCI_DEV_DOES_NOT_HAVE_IS_PCIE
 	return (xb->pdev->is_pcie > 0);
 #else
 	return (xb->flags.is_pcie > 0);
 #endif
+#endif
 }
 
 static const unsigned int CLK_SRC_MASK = ((1 << 13) | (1 << 12) | (1 << 1));