diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c
index 65e003eb15..9e4297adaf 100644
--- a/src/udev/udev-builtin-net_id.c
+++ b/src/udev/udev-builtin-net_id.c
@@ -217,7 +217,7 @@ static int dev_pci_onboard(sd_device *dev, const LinkInfo *info, NetNames *names
                 names->pci_onboard[0] = '\0';
         log_device_debug(dev, "Onboard index identifier: index=%lu phys_port=%s dev_port=%lu → %s",
                          idx, strempty(info->phys_port_name), dev_port,
-                         empty_to_na(names->pci_slot));
+                         empty_to_na(names->pci_onboard));
 
         if (sd_device_get_sysattr_value(names->pcidev, "label", &names->pci_onboard_label) >= 0)
                 log_device_debug(dev, "Onboard label from PCI device: %s", names->pci_onboard_label);