diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index 948f5800d..19ae9ad40 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -245,12 +245,7 @@ def is_scalar_sequence_field(field: ModelField) -> bool:
 
 def get_typed_signature(call: Callable[..., Any]) -> inspect.Signature:
     signature = inspect.signature(call)
-    nsobj = call
-    while hasattr(nsobj, "__wrapped__"):
-        # The __wrapped__ attribute is set by decorators, e.g. functools.wraps.
-        # This while loop allows rereferencing forward references on decorated
-        # methods.
-        nsobj = nsobj.__wrapped__  # type: ignore
+    nsobj = inspect.unwrap(call)
     globalns = getattr(nsobj, "__globals__", {})
     typed_params = [
         inspect.Parameter(