1 files changed, 1 insertions, 0 deletions
diff --git a/python/apt_pkgmodule.cc b/python/apt_pkgmodule.cc
index dea34958..fd7a83cd 100644
--- a/python/apt_pkgmodule.cc
+++ b/python/apt_pkgmodule.cc
@@ -218,6 +218,7 @@ static PyObject *sha1sum(PyObject *Self,PyObject *Args)
       char *s;
       Py_ssize_t len;
       SHA1Summation Sum;
+      PyString_AsStringAndSize(Obj, &s, &len);
       Sum.Add((const unsigned char*)s, len);
       return CppPyString(Sum.Result().Value());
    }