1 files changed, 3 insertions, 1 deletions
diff --git a/Modules/_io/iobase.c b/Modules/_io/iobase.c
index 1b7cb0f..e372990 100644
--- a/Modules/_io/iobase.c
+++ b/Modules/_io/iobase.c
@@ -69,7 +69,9 @@ _Py_IDENTIFIER(read);
 static PyObject *
 iobase_unsupported(const char *message)
 {
-    PyErr_SetString(IO_STATE->unsupported_operation, message);
+    _PyIO_State *state = IO_STATE();
+    if (state != NULL)
+        PyErr_SetString(state->unsupported_operation, message);
     return NULL;
 }