diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 7212df9..94943f6 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -948,6 +948,8 @@
 		if (PyUnicode_Check(bb))
 		    return PyUnicode_Concat((PyObject *)a, bb);
 #endif
+                if (PyBytes_Check(bb))
+			return PyBytes_Concat((PyObject *)a, bb);
 		PyErr_Format(PyExc_TypeError,
 			     "cannot concatenate 'str' and '%.200s' objects",
 			     bb->ob_type->tp_name);