diff --git a/torch/_C/__init__.pyi.in b/torch/_C/__init__.pyi.in
index 66ecec5fe0e..5bbecdb1125 100644
--- a/torch/_C/__init__.pyi.in
+++ b/torch/_C/__init__.pyi.in
@@ -831,7 +831,7 @@ class Generator(object):
 
 
 # Defined in torch/csrc/utils/python_dispatch.cpp
-def _dispatch_library(kind: str, name: str, dispatch: str, file: str, linenum: Any) -> Any: ...
+def _dispatch_library(kind: str, name: str, dispatch: str, file: str = "", linenum: Any = 0) -> Any: ...
 
 # Defined in torch/csrc/utils/init.cpp
 class BenchmarkConfig(object):
diff --git a/torch/_python_dispatcher.py b/torch/_python_dispatcher.py
index f886a85efd3..ee2c7d27945 100644
--- a/torch/_python_dispatcher.py
+++ b/torch/_python_dispatcher.py
@@ -66,7 +66,7 @@ class PythonDispatcher:
 
     def __init__(self):
         C._dispatch_check_invariants(self.name)  # type: ignore[attr-defined]
-        self.ref = C._dispatch_library("FRAGMENT", self.namespace, "")  # type: ignore[attr-defined]
+        self.ref = C._dispatch_library("FRAGMENT", self.namespace, "")
         self.ref.def_("foo(Tensor x) -> Tensor")
 
     """