diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c
index c69e39fdd02b..69b2a6cec6e7 100644
--- a/drivers/char/agp/amd64-agp.c
+++ b/drivers/char/agp/amd64-agp.c
@@ -545,7 +545,7 @@ static int agp_amd64_probe(struct pci_dev *pdev,
 	/* Fill in the mode register */
 	pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
 
-	if (cache_nbs(pdev, cap_ptr) == -1) {
+	if (cache_nbs(pdev, cap_ptr) < 0) {
 		agp_put_bridge(bridge);
 		return -ENODEV;
 	}