diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 07755b856973..e3b69f876d24 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -132,8 +132,10 @@ static int video_detect_portege_r100(const struct dmi_system_id *d)
 	struct pci_dev *dev;
 	/* Search for Trident CyberBlade XP4m32 to confirm Portégé R100 */
 	dev = pci_get_device(PCI_VENDOR_ID_TRIDENT, 0x2100, NULL);
-	if (dev)
+	if (dev) {
 		acpi_backlight_dmi = acpi_backlight_vendor;
+		pci_dev_put(dev);
+	}
 	return 0;
 }