diff --git a/locust/stats.py b/locust/stats.py
index 4ba2064402..3feacc0512 100644
--- a/locust/stats.py
+++ b/locust/stats.py
@@ -276,7 +276,7 @@ def log_error(self, error):
     @property
     def fail_ratio(self):
         try:
-            return float(self.num_failures) / (self.num_requests + self.num_failures)
+            return float(self.num_failures) / self.num_requests
         except ZeroDivisionError:
             if self.num_failures > 0:
                 return 1.0
diff --git a/locust/test/test_stats.py b/locust/test/test_stats.py
index 4b45aeedb1..fcfee1cc3a 100644
--- a/locust/test/test_stats.py
+++ b/locust/test/test_stats.py
@@ -252,6 +252,18 @@ def test_diff_response_times_dicts(self):
         ))
 
 
+class TestStatsEntry(unittest.TestCase):
+    def setUp(self, *args, **kwargs):
+        super(TestStatsEntry, self).setUp(*args, **kwargs)
+        self.stats = RequestStats()
+
+    def test_fail_ratio_with_failures(self):
+        s = StatsEntry(self.stats, "/", "GET")
+        s.num_requests = 10
+        s.num_failures = 5
+        self.assertAlmostEqual(s.fail_ratio, 0.5)
+
+
 class TestRequestStatsWithWebserver(WebserverTestCase):
     def test_request_stats_content_length(self):
         class MyLocust(HttpLocust):