diff --git a/Misc/NEWS.d/next/Library/2025-12-11-23-57-20.gh-issue-142606.Xd3xTx.rst b/Misc/NEWS.d/next/Library/2025-12-11-23-57-20.gh-issue-142606.Xd3xTx.rst
new file mode 100644
index 00000000000000..c402bd1723d663
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-12-11-23-57-20.gh-issue-142606.Xd3xTx.rst
@@ -0,0 +1,3 @@
+Fix two internal C API call sites where ``PyObject_CallFunction`` was
+incorrectly passed an extra ``NULL`` argument in
+:class:`collections.deque` and in the import machinery.
diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index 3ba48d5d9d3c64..e8e64a0bbafa78 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -634,7 +634,7 @@ deque_copy_impl(dequeobject *deque)
                                      (PyObject *)deque);
     else
         result = PyObject_CallFunction((PyObject *)(Py_TYPE(deque)), "Oi",
-                                       deque, old_deque->maxlen, NULL);
+                                       deque, old_deque->maxlen);
     if (result != NULL && !PyObject_TypeCheck(result, state->deque_type)) {
         PyErr_Format(PyExc_TypeError,
                      "%.200s() must return a deque, not %.200s",
diff --git a/Python/import.c b/Python/import.c
index 4dd247fac27654..cb77ae331ca627 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -4067,7 +4067,7 @@ PyImport_Import(PyObject *module_name)
        Always use absolute import here.
        Calling for side-effect of import. */
     r = PyObject_CallFunction(import, "OOOOi", module_name, globals,
-                              globals, from_list, 0, NULL);
+                              globals, from_list, 0);
     if (r == NULL)
         goto err;
     Py_DECREF(r);