diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 3ecd7fc..5bde4b7 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -36,12 +36,14 @@
 
 _Py_IDENTIFIER(_);
 _Py_IDENTIFIER(__sizeof__);
+_Py_IDENTIFIER(_xoptions);
 _Py_IDENTIFIER(buffer);
 _Py_IDENTIFIER(builtins);
 _Py_IDENTIFIER(encoding);
 _Py_IDENTIFIER(path);
 _Py_IDENTIFIER(stdout);
 _Py_IDENTIFIER(stderr);
+_Py_IDENTIFIER(warnoptions);
 _Py_IDENTIFIER(write);
 
 PyObject *
@@ -1479,13 +1481,17 @@
 static PyObject *
 get_warnoptions(void)
 {
-    PyObject *warnoptions = PyThreadState_GET()->interp->warnoptions;
+    PyObject *warnoptions = _PySys_GetObjectId(&PyId_warnoptions);
     if (warnoptions == NULL || !PyList_Check(warnoptions)) {
         Py_XDECREF(warnoptions);
         warnoptions = PyList_New(0);
         if (warnoptions == NULL)
             return NULL;
-        PyThreadState_GET()->interp->warnoptions = warnoptions;
+        if (_PySys_SetObjectId(&PyId_warnoptions, warnoptions)) {
+            Py_DECREF(warnoptions);
+            return NULL;
+        }
+        Py_DECREF(warnoptions);
     }
     return warnoptions;
 }
@@ -1493,7 +1499,7 @@
 void
 PySys_ResetWarnOptions(void)
 {
-    PyObject *warnoptions = PyThreadState_GET()->interp->warnoptions;
+    PyObject *warnoptions = _PySys_GetObjectId(&PyId_warnoptions);
     if (warnoptions == NULL || !PyList_Check(warnoptions))
         return;
     PyList_SetSlice(warnoptions, 0, PyList_GET_SIZE(warnoptions), NULL);
@@ -1522,20 +1528,24 @@
 int
 PySys_HasWarnOptions(void)
 {
-    PyObject *warnoptions = PyThreadState_GET()->interp->warnoptions;
+    PyObject *warnoptions = _PySys_GetObjectId(&PyId_warnoptions);
     return (warnoptions != NULL && (PyList_Size(warnoptions) > 0)) ? 1 : 0;
 }
 
 static PyObject *
 get_xoptions(void)
 {
-    PyObject *xoptions = PyThreadState_GET()->interp->xoptions;
+    PyObject *xoptions = _PySys_GetObjectId(&PyId__xoptions);
     if (xoptions == NULL || !PyDict_Check(xoptions)) {
         Py_XDECREF(xoptions);
         xoptions = PyDict_New();
         if (xoptions == NULL)
             return NULL;
-        PyThreadState_GET()->interp->xoptions = xoptions;
+        if (_PySys_SetObjectId(&PyId__xoptions, xoptions)) {
+            Py_DECREF(xoptions);
+            return NULL;
+        }
+        Py_DECREF(xoptions);
     }
     return xoptions;
 }
@@ -2084,16 +2094,6 @@
 #undef SET_SYS_FROM_STRING_BORROW
 
 /* Updating the sys namespace, returning integer error codes */
-#define SET_SYS_FROM_STRING_BORROW_INT_RESULT(key, value)  \
-    do {                                                   \
-        PyObject *v = (value);                             \
-        if (v == NULL)                                     \
-            return -1;                                     \
-        res = PyDict_SetItemString(sysdict, key, v);       \
-        if (res < 0) {                                     \
-            return res;                                    \
-        }                                                  \
-    } while (0)
 #define SET_SYS_FROM_STRING_INT_RESULT(key, value)         \
     do {                                                   \
         PyObject *v = (value);                             \
@@ -2138,15 +2138,11 @@
     SET_SYS_FROM_STRING_INT_RESULT("base_exec_prefix",
                         PyUnicode_FromWideChar(Py_GetExecPrefix(), -1));
 
-    PyObject *warnoptions = get_warnoptions();
-    if (warnoptions == NULL)
+    if (get_warnoptions() == NULL)
         return -1;
-    SET_SYS_FROM_STRING_BORROW_INT_RESULT("warnoptions", warnoptions);
 
-    PyObject *xoptions = get_xoptions();
-    if (xoptions == NULL)
+    if (get_xoptions() == NULL)
         return -1;
-    SET_SYS_FROM_STRING_BORROW_INT_RESULT("_xoptions", xoptions);
 
     if (PyErr_Occurred())
         return -1;
@@ -2154,7 +2150,6 @@
 }
 
 #undef SET_SYS_FROM_STRING_INT_RESULT
-#undef SET_SYS_FROM_STRING_BORROW_INT_RESULT
 
 static PyObject *
 makepathobject(const wchar_t *path, wchar_t delim)