diff --git a/Manual.org b/Manual.org
index eb48901..5106799 100644
--- a/Manual.org
+++ b/Manual.org
@@ -4190,7 +4190,7 @@ def format_gpu_device_list(iterator):
     def get_entries(iterator):
         for d in iterator:
             if d.idClass == 0x030000:
-                yield (vendor_dict.get(d.id_Vendor, "unknown"), "{:04x}:{:04x}".format(d.idVendor, d.idProduct))
+                yield (vendor_dict.get(d.idVendor, "unknown"), "{:04x}:{:04x}".format(d.idVendor, d.idProduct))
     return [entry for entry in get_entries(iterator)]
 
 arg_specs = {
diff --git a/library/hardware_facts.py b/library/hardware_facts.py
index 1338b01..e6a1e5f 100755
--- a/library/hardware_facts.py
+++ b/library/hardware_facts.py
@@ -93,7 +93,7 @@ def format_gpu_device_list(iterator):
     def get_entries(iterator):
         for d in iterator:
             if d.idClass == 0x030000:
-                yield (vendor_dict.get(d.id_Vendor, "unknown"), "{:04x}:{:04x}".format(d.idVendor, d.idProduct))
+                yield (vendor_dict.get(d.idVendor, "unknown"), "{:04x}:{:04x}".format(d.idVendor, d.idProduct))
     return [entry for entry in get_entries(iterator)]
 
 arg_specs = {