diff -r a7e0a1dbfbb6 -r c87ec9dcce44 Lib/test/test_xdrlib.py
--- a/Lib/test/test_xdrlib.py	Sun Mar 27 10:15:57 2011 +0200
+++ b/Lib/test/test_xdrlib.py	Sun Mar 27 11:58:03 2011 +0200
@@ -12,6 +12,7 @@
         a = [b'what', b'is', b'hapnin', b'doctor']
 
         p.pack_int(42)
+        p.pack_int(-17)
         p.pack_uint(9)
         p.pack_bool(True)
         p.pack_bool(False)
@@ -29,6 +30,7 @@
         self.assertEqual(up.get_position(), 0)
 
         self.assertEqual(up.unpack_int(), 42)
+        self.assertEqual(up.unpack_int(), -17)
         self.assertEqual(up.unpack_uint(), 9)
         self.assertTrue(up.unpack_bool() is True)
 
diff -r a7e0a1dbfbb6 -r c87ec9dcce44 Lib/xdrlib.py
--- a/Lib/xdrlib.py	Sun Mar 27 10:15:57 2011 +0200
+++ b/Lib/xdrlib.py	Sun Mar 27 11:58:03 2011 +0200
@@ -49,8 +49,10 @@
 
     def pack_uint(self, x):
         self.__buf.write(struct.pack('>L', x))
+        
+    def pack_int(self, x):
+        self.__buf.write(struct.pack('>l', x))
 
-    pack_int = pack_uint
     pack_enum = pack_int
 
     def pack_bool(self, x):