diff --git a/vm/src/obj/objfunction.rs b/vm/src/obj/objfunction.rs
index 4f5af1bec2..7386772ea0 100644
--- a/vm/src/obj/objfunction.rs
+++ b/vm/src/obj/objfunction.rs
@@ -11,7 +11,7 @@ use crate::obj::objcoroutine::PyCoroutine;
 use crate::obj::objgenerator::PyGenerator;
 use crate::pyobject::{
     IdProtocol, ItemProtocol, PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult, PyValue,
-    TypeProtocol,
+    ThreadSafe, TypeProtocol,
 };
 use crate::scope::Scope;
 use crate::slots::{SlotCall, SlotDescriptor};
@@ -28,6 +28,7 @@ pub struct PyFunction {
     defaults: Option<PyTupleRef>,
     kw_only_defaults: Option<PyDictRef>,
 }
+impl ThreadSafe for PyFunction {}
 
 impl SlotDescriptor for PyFunction {
     fn descr_get(
@@ -293,6 +294,8 @@ pub struct PyBoundMethod {
     pub function: PyObjectRef,
 }
 
+impl ThreadSafe for PyBoundMethod {}
+
 impl SlotCall for PyBoundMethod {
     fn call(&self, args: PyFuncArgs, vm: &VirtualMachine) -> PyResult {
         let args = args.insert(self.object.clone());