diff --git a/rq/registry.py b/rq/registry.py
index c9237ca..9cb410c 100644
--- a/rq/registry.py
+++ b/rq/registry.py
@@ -304,7 +304,7 @@ class ScheduledJobRegistry(BaseRegistry):
 
 
 def clean_registries(queue):
-    """Cleans StartedJobRegistry and FinishedJobRegistry of a queue."""
+    """Cleans StartedJobRegistry, FinishedJobRegistry and FailedJobRegistry of a queue."""
     registry = FinishedJobRegistry(name=queue.name,
                                    connection=queue.connection,
                                    job_class=queue.job_class)