diff --git a/templates/zerver/help/import-from-slack.md b/templates/zerver/help/import-from-slack.md
index 2e7a05b2a8..2493905e6a 100644
--- a/templates/zerver/help/import-from-slack.md
+++ b/templates/zerver/help/import-from-slack.md
@@ -128,6 +128,9 @@ root domain. Replace the last line above with the following, after replacing
 
 - The "joined #channel_name" messages are not imported.
 
+- Messages in threads are still imported, but they are not explicitly marked as
+  to be in a thread.
+
 [upgrade-zulip-from-git]: https://zulip.readthedocs.io/en/latest/production/upgrade-or-modify.html#upgrading-from-a-git-repository
 
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