diff --git a/lib/ansible/module_utils/basic.py b/lib/ansible/module_utils/basic.py
index 0c8e09660ec..6cebdd5912e 100644
--- a/lib/ansible/module_utils/basic.py
+++ b/lib/ansible/module_utils/basic.py
@@ -2058,7 +2058,7 @@ class AnsibleModule(object):
 
         backupdest = ''
         if os.path.exists(fn):
-            # backups named basename-YYYY-MM-DD@HH:MM:SS~
+            # backups named basename.PID.YYYY-MM-DD@HH:MM:SS~
             ext = time.strftime("%Y-%m-%d@%H:%M:%S~", time.localtime(time.time()))
             backupdest = '%s.%s.%s' % (fn, os.getpid(), ext)