diff --git a/cassandra/concurrent.py b/cassandra/concurrent.py
index e4b00833..d29ff84b 100644
--- a/cassandra/concurrent.py
+++ b/cassandra/concurrent.py
@@ -45,13 +45,13 @@ def execute_concurrent(session, statements_and_parameters, concurrency=100, rais
 
     `results_generator` controls how the results are returned.
 
-    If :const:`False`, the results are returned only after all requests have completed.
+        If :const:`False`, the results are returned only after all requests have completed.
 
-    If :const:`True`, a generator expression is returned. Using a generator results in
-    a constrained memory footprint when the results set will be large -- results are yielded
-    as they return instead of materializing the entire list at once. The trade for lower memory
-    footprint is marginal CPU overhead (more thread coordination and sorting out-of-order results
-    on-the-fly).
+        If :const:`True`, a generator expression is returned. Using a generator results in a constrained
+        memory footprint when the results set will be large -- results are yielded
+        as they return instead of materializing the entire list at once. The trade for lower memory
+        footprint is marginal CPU overhead (more thread coordination and sorting out-of-order results
+        on-the-fly).
 
     A sequence of ``(success, result_or_exc)`` tuples is returned in the same
     order that the statements were passed in.  If ``success`` is :const:`False`,