diff --git a/Storage-backend-compatibility.md b/Storage-backend-compatibility.md
index 51a1bdb..03d77b1 100644
--- a/Storage-backend-compatibility.md
+++ b/Storage-backend-compatibility.md
@@ -4,6 +4,7 @@ Some storage backends do not support all the features of S3:
 
 * does not return meaningful ETag
 * does not support multi-part upload
+* only supports object listing when delimiter is "/" -- does not support recursive listing
 
 ## Azure