diff --git a/derive-impl/src/pyclass.rs b/derive-impl/src/pyclass.rs
index 8ef479976..6477111dc 100644
--- a/derive-impl/src/pyclass.rs
+++ b/derive-impl/src/pyclass.rs
@@ -702,7 +702,9 @@ where
         let slot_name = slot_ident.to_string();
         let tokens = {
             const NON_ATOMIC_SLOTS: &[&str] = &["as_buffer"];
-            const POINTER_SLOTS: &[&str] = &["as_number", "as_sequence", "as_mapping"];
+            const POINTER_SLOTS: &[&str] = &["as_sequence", "as_mapping"];
+            const STATIC_SLOTS: &[&str] = &["as_number"];
+
             if NON_ATOMIC_SLOTS.contains(&slot_name.as_str()) {
                 quote_spanned! { span =>
                     slots.#slot_ident = Some(Self::#ident as _);
@@ -711,6 +713,10 @@ where
                 quote_spanned! { span =>
                     slots.#slot_ident.store(Some(PointerSlot::from(Self::#ident())));
                 }
+            } else if STATIC_SLOTS.contains(&&slot_name.as_str()) {
+                quote_spanned! { span =>
+                    slots.#slot_ident = Self::#ident();
+                }
             } else {
                 quote_spanned! { span =>
                     slots.#slot_ident.store(Some(Self::#ident as _));
diff --git a/vm/src/protocol/number.rs b/vm/src/protocol/number.rs
index c0a530818..050b3837b 100644
--- a/vm/src/protocol/number.rs
+++ b/vm/src/protocol/number.rs
@@ -197,6 +197,11 @@ impl PyNumberMethods {
         matrix_multiply: None,
         inplace_matrix_multiply: None,
     };
+
+    pub fn not_implemented() -> &'static PyNumberMethods {
+        static GLOBAL_NOT_IMPLEMENTED: PyNumberMethods = PyNumberMethods::NOT_IMPLEMENTED;
+        &GLOBAL_NOT_IMPLEMENTED
+    }
 }
 
 #[derive(Copy, Clone)]
diff --git a/vm/src/types/slot.rs b/vm/src/types/slot.rs
index f298419f4..b3c056877 100644
--- a/vm/src/types/slot.rs
+++ b/vm/src/types/slot.rs
@@ -27,7 +27,6 @@ macro_rules! atomic_func {
 
 // The corresponding field in CPython is `tp_` prefixed.
 // e.g. name -> tp_name
-#[derive(Default)]
 #[non_exhaustive]
 pub struct PyTypeSlots {
     /// # Safety
@@ -41,7 +40,10 @@ pub struct PyTypeSlots {
     // Methods to implement standard operations
 
     // Method suites for standard classes
-    pub as_number: AtomicCell<Option<PointerSlot<PyNumberMethods>>>,
+    /// # Safety
+    /// use only when initializing
+    /// use slot number for protocol
+    pub(crate) as_number: &'static PyNumberMethods,
     pub as_sequence: AtomicCell<Option<PointerSlot<PySequenceMethods>>>,
     pub as_mapping: AtomicCell<Option<PointerSlot<PyMappingMethods>>>,
 
@@ -93,6 +95,36 @@ pub struct PyTypeSlots {
     pub number: PyNumberSlots,
 }
 
+impl Default for PyTypeSlots {
+    fn default() -> Self {
+        Self {
+            name: Default::default(),
+            basicsize: Default::default(),
+            as_number: PyNumberMethods::not_implemented(),
+            as_sequence: Default::default(),
+            as_mapping: Default::default(),
+            hash: Default::default(),
+            call: Default::default(),
+            repr: Default::default(),
+            getattro: Default::default(),
+            setattro: Default::default(),
+            as_buffer: Default::default(),
+            richcompare: Default::default(),
+            iter: Default::default(),
+            iternext: Default::default(),
+            flags: Default::default(),
+            doc: Default::default(),
+            descr_get: Default::default(),
+            descr_set: Default::default(),
+            init: Default::default(),
+            new: Default::default(),
+            del: Default::default(),
+            member_count: Default::default(),
+            number: Default::default(),
+        }
+    }
+}
+
 impl PyTypeSlots {
     pub fn new(name: &'static str, flags: PyTypeFlags) -> Self {
         Self {