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-rw-r--r--Modules/zlibmodule.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Modules/zlibmodule.c b/Modules/zlibmodule.c
index a978370..551fd3e 100644
--- a/Modules/zlibmodule.c
+++ b/Modules/zlibmodule.c
@@ -940,7 +940,7 @@ PyZlib_crc32(PyObject *self, PyObject *args)
if (!PyArg_ParseTuple(args, "s#|k:crc32", &buf, &len, &crc32val))
return NULL;
crc32val = crc32(crc32val, buf, len);
- return PyLong_FromUnsignedLong(crc32val & 0xffffffff);
+ return PyLong_FromLong(crc32val & 0xffffffff);
}