diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index c132692..ec37928 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -125,7 +125,7 @@
         new->ob_bytes = PyMem_Malloc(alloc);
         if (new->ob_bytes == NULL) {
             Py_DECREF(new);
-            return NULL;
+            return PyErr_NoMemory();
         }
         if (bytes != NULL)
             memcpy(new->ob_bytes, bytes, size);