diff --git a/plugins/modules/s3_lifecycle.py b/plugins/modules/s3_lifecycle.py
index c12ce6b0897..4e41149000b 100644
--- a/plugins/modules/s3_lifecycle.py
+++ b/plugins/modules/s3_lifecycle.py
@@ -314,7 +314,7 @@ def build_rule(client, module):
             t_out = dict()
             if transition.get('transition_date'):
                 t_out['Date'] = transition['transition_date']
-            elif transition.get('transition_days'):
+            elif transition.get('transition_days') is not None:
                 t_out['Days'] = transition['transition_days']
             if transition.get('storage_class'):
                 t_out['StorageClass'] = transition['storage_class'].upper()