diff --git a/README.md b/README.md
index 60f73d6..4a74261 100644
--- a/README.md
+++ b/README.md
@@ -363,7 +363,7 @@ PROMPT KEYS:
 
         $ buku -u
         $ buku -u --tacit (show only failures and exceptions)
-    This operation does not modify the indexes, URLs, tags or comments. Only title is refreshed if fetched title is non-empty.
+    This operation can update the title, tags (appended) or description fields of non-immutable bookmarks by parsing the fetched page. Fields are updated only if the fetched fields are non-empty.
 13. **Delete** bookmark at index 15012014:
 
         $ buku -d 15012014
diff --git a/buku.1 b/buku.1
index cdf44cb..3fc8332 100644
--- a/buku.1
+++ b/buku.1
@@ -576,7 +576,7 @@ Applies to --title and --tag too. URL cannot be deleted without deleting the boo
 .EE
 .PP
 .IP "" 4
-This operation does not modify the indexes, URLs, tags or comments. Only title is refreshed if fetched title is non-empty.
+This operation can update the title, tags (appended) or description fields of non-immutable bookmarks by parsing the fetched page. Fields are updated only if the fetched fields are non-empty.
 .PP
 .IP 13. 4
 \fBDelete\fR bookmark at index 15012014: