diff --git a/frigate/api/app.py b/frigate/api/app.py
index de2f87a68..bf7a18c15 100644
--- a/frigate/api/app.py
+++ b/frigate/api/app.py
@@ -391,7 +391,7 @@ def config_set(request: Request, body: AppConfigSetBody):
         )
 
     if body.requires_restart == 0 or body.update_topic:
-        old_config = request.app.frigate_config
+        old_config: FrigateConfig = request.app.frigate_config
         request.app.frigate_config = config
 
         if body.update_topic and body.update_topic.startswith("config/cameras/"):
@@ -400,7 +400,7 @@ def config_set(request: Request, body: AppConfigSetBody):
             if field == "add":
                 settings = config.cameras[camera]
             elif field == "remove":
-                
+                settings = old_config.cameras[camera]
             else:
                 settings = config.get_nested_object(body.update_topic)
 
diff --git a/frigate/util/builtin.py b/frigate/util/builtin.py
index 52280ecd8..c3fcd3683 100644
--- a/frigate/util/builtin.py
+++ b/frigate/util/builtin.py
@@ -184,7 +184,7 @@ def create_mask(frame_shape, mask):
     mask_img[:] = 255
 
 
-def update_yaml_from_url(file_path, url):
+def update_yaml_from_url(file_path: str, url: str):
     parsed_url = urllib.parse.urlparse(url)
     query_string = urllib.parse.parse_qs(parsed_url.query, keep_blank_values=True)
 
@@ -213,7 +213,7 @@ def update_yaml_from_url(file_path, url):
             update_yaml_file(file_path, key_path, value)
 
 
-def update_yaml_file(file_path, key_path, new_value):
+def update_yaml_file(file_path: str, key_path: str, new_value: Any):
     yaml = YAML()
     yaml.indent(mapping=2, sequence=4, offset=2)