diff --git a/src/fastmcp/server/server.py b/src/fastmcp/server/server.py
index 97f14a7c9..25db16cd1 100644
--- a/src/fastmcp/server/server.py
+++ b/src/fastmcp/server/server.py
@@ -1136,9 +1136,7 @@ class FastMCP(Generic[LifespanResultT]):
                 if not self._should_enable_component(resource):
                     # Parent filter blocks this resource, continue searching
                     continue
-                result = list[ReadResourceContents](
-                    await mounted.server._read_resource_middleware(key)
-                )
+                result = list(await mounted.server._read_resource_middleware(key))
                 return result
             except NotFoundError:
                 continue