diff --git a/rosidl_cli/rosidl_cli/extensions.py b/rosidl_cli/rosidl_cli/extensions.py
index f4a80f082..9b1319193 100644
--- a/rosidl_cli/rosidl_cli/extensions.py
+++ b/rosidl_cli/rosidl_cli/extensions.py
@@ -18,7 +18,7 @@
 
 from rosidl_cli.entry_points import load_entry_points
 
-import yaml
+import yaml  #type: ignore[import-untyped]
 
 if TYPE_CHECKING:
     from typing import TypedDict