diff --git a/modules/ui_extra_networks.py b/modules/ui_extra_networks.py
index 9321a8c4d..7d2eccae2 100644
--- a/modules/ui_extra_networks.py
+++ b/modules/ui_extra_networks.py
@@ -8,6 +8,7 @@ import html
 import base64
 import urllib.parse
 import threading
+from typing import TYPE_CHECKING
 from types import SimpleNamespace
 from pathlib import Path
 from html.parser import HTMLParser
@@ -860,6 +861,8 @@ def create_ui(container, button_parent, tabname, skip_indexing = False):
         is_valid = (item is not None) and hasattr(item, 'name') and hasattr(item, 'filename')
 
         if is_valid:
+            if TYPE_CHECKING:
+                assert item is not None # Part of the definition of "is_valid"
             stat_size, stat_mtime = modelstats.stat(item.filename)
             if hasattr(item, 'size') and item.size > 0:
                 stat_size = item.size