1 files changed, 2 insertions, 2 deletions
diff --git a/Modules/_io/iobase.c b/Modules/_io/iobase.c
index c74672d..9b58137 100644
--- a/Modules/_io/iobase.c
+++ b/Modules/_io/iobase.c
@@ -777,9 +777,9 @@ rawiobase_read(PyObject *self, PyObject *args)
         return NULL;
 
     res = PyObject_CallMethodObjArgs(self, _PyIO_str_readinto, b, NULL);
-    if (res == NULL) {
+    if (res == NULL || res == Py_None) {
         Py_DECREF(b);
-        return NULL;
+        return res;
     }
 
     n = PyNumber_AsSsize_t(res, PyExc_ValueError);