- Changes donated by Elemental Security to make it work on AIX 5.3
  with IBM's 64-bit compiler (SF patch #1284289).  This also closes SF
  bug #105470: test_pwd fails on 64bit system (Opteron).
diff --git a/Modules/grpmodule.c b/Modules/grpmodule.c
index 136dca0..5f33fe9 100644
--- a/Modules/grpmodule.c
+++ b/Modules/grpmodule.c
@@ -85,9 +85,9 @@
 static PyObject *
 grp_getgrgid(PyObject *self, PyObject *args)
 {
-    int gid;
+    unsigned int gid;
     struct group *p;
-    if (!PyArg_ParseTuple(args, "i:getgrgid", &gid))
+    if (!PyArg_ParseTuple(args, "I:getgrgid", &gid))
         return NULL;
     if ((p = getgrgid(gid)) == NULL) {
 	PyErr_Format(PyExc_KeyError, "getgrgid(): gid not found: %d", gid);