diff --git a/Misc/NEWS.d/next/Core and Builtins/2020-06-26-22-22-44.bpo-1635741.mE0WHS.rst b/Misc/NEWS.d/next/Core and Builtins/2020-06-26-22-22-44.bpo-1635741.mE0WHS.rst
new file mode 100644
index 00000000000000..1947d5adb3608b
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2020-06-26-22-22-44.bpo-1635741.mE0WHS.rst	
@@ -0,0 +1 @@
+Port :mod:`termios` to multiphase initialization.
diff --git a/Modules/termios.c b/Modules/termios.c
index 75e5e523206f41..62bdb1f44cc433 100644
--- a/Modules/termios.c
+++ b/Modules/termios.c
@@ -997,44 +997,43 @@ static void termiosmodule_free(void *m) {
     termiosmodule_clear((PyObject *)m);
 }
 
-static struct PyModuleDef termiosmodule = {
-    PyModuleDef_HEAD_INIT,
-    "termios",
-    termios__doc__,
-    sizeof(termiosmodulestate),
-    termios_methods,
-    NULL,
-    termiosmodule_traverse,
-    termiosmodule_clear,
-    termiosmodule_free,
-};
-
-PyMODINIT_FUNC
-PyInit_termios(void)
-{
-    PyObject *m;
+static int 
+termios_exec(PyObject *module) {
     struct constant *constant = termios_constants;
-
-    if ((m = PyState_FindModule(&termiosmodule)) != NULL) {
-        Py_INCREF(m);
-        return m;
-    }
-
-    if ((m = PyModule_Create(&termiosmodule)) == NULL) {
-        return NULL;
-    }
-
-    termiosmodulestate *state = get_termios_state(m);
+    termiosmodulestate *state = get_termios_state(module);
     state->TermiosError = PyErr_NewException("termios.error", NULL, NULL);
-    if (state->TermiosError == NULL) {
-        return NULL;
+    if (PyModule_AddType(module, state->TermiosError) < 0) {
+        return -1;
     }
-    Py_INCREF(state->TermiosError);
-    PyModule_AddObject(m, "error", state->TermiosError);
 
     while (constant->name != NULL) {
-        PyModule_AddIntConstant(m, constant->name, constant->value);
+        if (PyModule_AddIntConstant(module, constant->name, constant->value) < 0) {
+            return -1;
+        }
         ++constant;
     }
-    return m;
+    return 0;
+}
+
+static PyModuleDef_Slot termios_slots[] = {
+    {Py_mod_exec, termios_exec},
+    {0, NULL}
+};
+
+static struct PyModuleDef termiosmodule = {
+    PyModuleDef_HEAD_INIT,
+    .m_name = "termios",
+    .m_doc = termios__doc__,
+    .m_size = sizeof(termiosmodulestate),
+    .m_methods = termios_methods,
+    .m_slots = termios_slots,
+    .m_traverse = termiosmodule_traverse,
+    .m_clear = termiosmodule_clear,
+    .m_free = termiosmodule_free,
+};
+
+PyMODINIT_FUNC
+PyInit_termios(void)
+{
+    return PyModuleDef_Init(&termiosmodule);
 }