1 files changed, 1 insertions, 1 deletions
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 9e35eb2..9f5db2a 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -2039,7 +2039,7 @@ builtin_round(PyObject *self, PyObject *args, PyObject *kwds)
         return NULL;
     }
 
-    if (ndigits == NULL)
+    if (ndigits == NULL || ndigits == Py_None)
         result = PyObject_CallFunctionObjArgs(round, NULL);
     else
         result = PyObject_CallFunctionObjArgs(round, ndigits, NULL);