diff --git a/arrow/arrow.py b/arrow/arrow.py
index 7cd5dcb1f..89678e6da 100644
--- a/arrow/arrow.py
+++ b/arrow/arrow.py
@@ -351,11 +351,12 @@ def interval(cls, frame, start, end, interval=1, tz=None):
         '''
         if interval < 1:
             raise ValueError("interval has to be a positive integer")
-
-        spanRange = cls.span_range(frame,start,end,tz)
-
-        bound = (len(spanRange) // interval) * interval
-        return [ (spanRange[i][0],spanRange[i+ interval - 1][1]) for i in range(0,bound, interval) ]
+        range_span = cls.span_range(frame, start, end, tz)
+        bound = (len(range_span) // interval) * interval
+        _range = [(range_span[i][0], range_span[i + interval - 1][1]) for i in range(0,bound, interval) ]        
+        if bound < len(range_span):
+            _range.append((range_span[bound][0], range_span[-1][1]))
+        return _range
 
     # representations
 
diff --git a/tests/arrow_tests.py b/tests/arrow_tests.py
index e5a8b5223..e65b623c9 100644
--- a/tests/arrow_tests.py
+++ b/tests/arrow_tests.py
@@ -1001,9 +1001,20 @@ def test_incorrect_input(self):
     def test_correct(self):
         result = arrow.Arrow.interval('hour', datetime(2013, 5, 5, 12, 30), datetime(2013, 5, 5, 17, 15),2)
 
-        assertEqual(result,[(arrow.Arrow(2013, 5, 5, 12), arrow.Arrow(2013, 5, 5, 13, 59, 59, 999999)),
+        assertEqual(result,[
+            (arrow.Arrow(2013, 5, 5, 12), arrow.Arrow(2013, 5, 5, 13, 59, 59, 999999)),
             (arrow.Arrow(2013, 5, 5, 14), arrow.Arrow(2013, 5, 5, 15, 59, 59, 999999)),
-            (arrow.Arrow(2013, 5, 5, 16), arrow.Arrow(2013, 5, 5, 17, 59, 59, 999999))])
+            (arrow.Arrow(2013, 5, 5, 16), arrow.Arrow(2013, 5, 5, 17, 59, 59, 999999))
+        ])
+        
+    def test_correct2(self):
+        result = arrow.Arrow.interval('hour', datetime(2013, 5, 5, 12, 30), datetime(2013, 5, 5, 22, 15),4)
+
+        assertEqual(result,[
+            (arrow.Arrow(2013, 5, 5, 12), arrow.Arrow(2013, 5, 5, 15, 59, 59, 999999)),
+            (arrow.Arrow(2013, 5, 5, 16), arrow.Arrow(2013, 5, 5, 19, 59, 59, 999999)),
+            (arrow.Arrow(2013, 5, 5, 20), arrow.Arrow(2013, 5, 5, 22, 59, 59, 999999))
+        ])
 
 class ArrowSpanTests(Chai):