diff --git a/src/pci_passthrough_assist/pci_device.py b/src/pci_passthrough_assist/pci_device.py
index a44135e..e614f82 100644
--- a/src/pci_passthrough_assist/pci_device.py
+++ b/src/pci_passthrough_assist/pci_device.py
@@ -6,6 +6,7 @@ from os import listdir
 class PciDevice:
 
     def __init__(self, device_id: str):
+        assert exists(f"/sys/bus/pci/devices/{self.device_id}")
         self.device_id = device_id
 
     def driver_name(self) -> str: