322c322
< 		element = PyInt_FromLong((long)(self->state[i]));
---
> 		element = PyLong_FromUnsignedLong((self->state[i]));
342c342
< 	long element;
---
> 	unsigned long element;
356,359c356,364
< 		element = PyInt_AsLong(PyTuple_GET_ITEM(state, i));
< 		if (element == -1 && PyErr_Occurred())
< 			return NULL;
< 		self->state[i] = (unsigned long)element;
---
> 		element = PyLong_AsUnsignedLong(PyTuple_GET_ITEM(state, i));
> 		if ((long)element == -1 && PyErr_Occurred()) {
> 			PyErr_Clear();
> 			/* backward compatibility for old pickles with negative values */
> 			element = (unsigned long) PyInt_AsLong(PyTuple_GET_ITEM(state, i));
> 			if ((long)element == -1 && PyErr_Occurred())
> 				return NULL;
> 			}
> 		self->state[i] = element;