diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index 1aa78c4e2..cb4b7043a 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -12,6 +12,7 @@ from typing import (
     Mapping,
     Optional,
     Sequence,
+    Set,
     Tuple,
     Type,
     Union,
@@ -701,7 +702,7 @@ async def solve_dependencies(
     )
 
 
-def _extract_error_locs(errors_):
+def _extract_error_locs(errors_: Sequence[Any] | List[Dict[str, Any]]) -> Set[str]:
     if isinstance(errors_, list):
         errors_ = may_v1._regenerate_error_with_loc(errors=errors_, loc_prefix=())