diff --git a/rq/results.py b/rq/results.py
index a6dafde..8ff770d 100644
--- a/rq/results.py
+++ b/rq/results.py
@@ -169,7 +169,10 @@ class Result(object):
         if pipeline is None:
             self.id = result.decode()
         if ttl is not None:
-            connection.expire(key, ttl)
+            if ttl == -1:
+                connection.persist(key)
+            else:
+                connection.expire(key, ttl)
         return self.id
 
     def serialize(self):
diff --git a/tests/test_results.py b/tests/test_results.py
index 4f705f5..9bc1b9e 100644
--- a/tests/test_results.py
+++ b/tests/test_results.py
@@ -214,3 +214,25 @@ class TestScheduledJobRegistry(RQTestCase):
 
         job = queue.enqueue(div_by_zero)
         self.assertEqual(job.latest_result().type, Result.Type.FAILED)
+
+    def test_job_return_value_result_ttl_infinity(self):
+        """Test job.return_value when queue.result_ttl=-1"""
+        queue = Queue(connection=self.connection, result_ttl=-1)
+        job = queue.enqueue(say_hello)
+
+        # Returns None when there's no result
+        self.assertIsNone(job.return_value())
+
+        Result.create(job, Result.Type.SUCCESSFUL, ttl=-1, return_value=1)
+        self.assertEqual(job.return_value(), 1)
+
+    def test_job_return_value_result_ttl_zero(self):
+        """Test job.return_value when queue.result_ttl=0"""
+        queue = Queue(connection=self.connection, result_ttl=0)
+        job = queue.enqueue(say_hello)
+
+        # Returns None when there's no result
+        self.assertIsNone(job.return_value())
+
+        Result.create(job, Result.Type.SUCCESSFUL, ttl=0, return_value=1)
+        self.assertIsNone(job.return_value())