diff --git a/dateutil/relativedelta.py b/dateutil/relativedelta.py
index 557d521..84d5f83 100644
--- a/dateutil/relativedelta.py
+++ b/dateutil/relativedelta.py
@@ -423,6 +423,7 @@ def __eq__(self, other):
                 self.hours == other.hours and
                 self.minutes == other.minutes and
                 self.seconds == other.seconds and
+                self.microseconds == other.microseconds and
                 self.leapdays == other.leapdays and
                 self.year == other.year and
                 self.month == other.month and
diff --git a/dateutil/test/test.py b/dateutil/test/test.py
index f5ed765..f323c07 100644
--- a/dateutil/test/test.py
+++ b/dateutil/test/test.py
@@ -226,6 +226,17 @@ def testBoolean(self):
         self.assertFalse(relativedelta(days=0))
         self.assertTrue(relativedelta(days=1))
 
+    def testComparison(self):
+        d1 = relativedelta(years=1, months=1, days=1, leapdays=0, hours=1, 
+                           minutes=1, seconds=1, microseconds=1)
+        d2 = relativedelta(years=1, months=1, days=1, leapdays=0, hours=1, 
+                           minutes=1, seconds=1, microseconds=1)
+        d3 = relativedelta(years=1, months=1, days=1, leapdays=0, hours=1, 
+                           minutes=1, seconds=1, microseconds=2)
+
+        self.assertEqual(d1, d2)
+        self.assertNotEqual(d1, d3)
+
     def testWeeks(self):
         # Test that the weeks property is working properly.
         rd = relativedelta(years=4, months=2, weeks=8, days=6)