1 files changed, 5 insertions, 1 deletions
diff --git a/Python/gc_free_threading.c b/Python/gc_free_threading.c
index 4524382e4f6..7e4137a8e34 100644
--- a/Python/gc_free_threading.c
+++ b/Python/gc_free_threading.c
@@ -1639,7 +1639,11 @@ PyObject *
 _PyObject_GC_New(PyTypeObject *tp)
 {
     size_t presize = _PyType_PreHeaderSize(tp);
-    PyObject *op = gc_alloc(tp, _PyObject_SIZE(tp), presize);
+    size_t size = _PyObject_SIZE(tp);
+    if (_PyType_HasFeature(tp, Py_TPFLAGS_INLINE_VALUES)) {
+        size += _PyInlineValuesSize(tp);
+    }
+    PyObject *op = gc_alloc(tp, size, presize);
     if (op == NULL) {
         return NULL;
     }