diff --git a/docs/client/concepts.html b/docs/client/concepts.html
index 4fb6ffa178..0475ddb6e5 100644
--- a/docs/client/concepts.html
+++ b/docs/client/concepts.html
@@ -558,8 +558,9 @@ database cursor is passed to `#each`, it will wire up all of the
 machinery to efficiently add and move DOM nodes as new results enter
 the query.
 
-Helpers can take arguments, and they receive the current template data
-in `this`:
+Helpers can take arguments, and they receive the current template context data
+in `this`. Note that some block helpers change the current context (notably
+`each` and `with`):
 
     // in a JavaScript file
     Template.players.leagueIs = function (league) {