diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index 081b63a8b..1ccb8d03c 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -231,12 +231,17 @@ def get_flat_params(dependant: Dependant) -> List[ModelField]:
 def get_typed_signature(call: Callable[..., Any]) -> inspect.Signature:
     signature = inspect.signature(call)
     globalns = getattr(call, "__globals__", {})
+
     typed_params = [
         inspect.Parameter(
             name=param.name,
             kind=param.kind,
             default=param.default,
-            annotation=get_typed_annotation(param.annotation, globalns),
+            annotation=get_typed_annotation(
+                param.annotation,
+                globalns,
+                collect_outer_locals(),
+            ),
         )
         for param in signature.parameters.values()
     ]
@@ -244,10 +249,30 @@ def get_typed_signature(call: Callable[..., Any]) -> inspect.Signature:
     return typed_signature
 
 
-def get_typed_annotation(annotation: Any, globalns: Dict[str, Any]) -> Any:
+def collect_outer_locals() -> Dict[str, Any]:
+    frame = inspect.currentframe()
+
+    locals = {}
+    finded = False
+    while frame is not None:
+        if finded:
+            locals.update(frame.f_locals)
+
+        # Find first FastAPI outer frame
+        if frame.f_code.co_name == "decorator":
+            finded = True
+
+        frame = frame.f_back
+
+    return locals
+
+
+def get_typed_annotation(
+    annotation: Any, globalns: Dict[str, Any], localns: Dict[str, Any]
+) -> Any:
     if isinstance(annotation, str):
         annotation = ForwardRef(annotation)
-        annotation = evaluate_forwardref(annotation, globalns, globalns)
+        annotation = evaluate_forwardref(annotation, globalns, localns)
     return annotation
 
 
@@ -259,7 +284,11 @@ def get_typed_return_annotation(call: Callable[..., Any]) -> Any:
         return None
 
     globalns = getattr(call, "__globals__", {})
-    return get_typed_annotation(annotation, globalns)
+    return get_typed_annotation(
+        annotation,
+        globalns,
+        collect_outer_locals(),
+    )
 
 
 def get_dependant(
diff --git a/tests/test_get_request_body.py b/tests/test_get_request_body.py
index cc567b88f..4f466e6c9 100644
--- a/tests/test_get_request_body.py
+++ b/tests/test_get_request_body.py
@@ -1,3 +1,7 @@
+from __future__ import annotations
+
+from typing import Any
+
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
 from pydantic import BaseModel
@@ -105,3 +109,31 @@ def test_openapi_schema():
             }
         },
     }
+
+
+def test_get_with_local_declared_body():
+    def wrap(application: FastAPI, *args: Any):
+        def wrapper(func):
+            return application.get(*args)(func)
+
+        return wrapper
+
+    def init_app() -> FastAPI:
+        application = FastAPI()
+
+        class LocalProduct(BaseModel):
+            name: str
+            description: str = None  # type: ignore
+            price: float
+
+        @wrap(application, "/product")
+        async def create_item(product: LocalProduct) -> LocalProduct:
+            return product
+
+        return application
+
+    client = TestClient(init_app())
+
+    body = {"name": "Foo", "description": "Some description", "price": 5.5}
+    response = client.request("GET", "/product", json=body)
+    assert response.json() == body