diff --git a/cmd/helm/rollback.go b/cmd/helm/rollback.go
index ea4b75cb1..66b39b5ac 100644
--- a/cmd/helm/rollback.go
+++ b/cmd/helm/rollback.go
@@ -32,8 +32,8 @@ const rollbackDesc = `
 This command rolls back a release to a previous revision.
 
 The first argument of the rollback command is the name of a release, and the
-second is a revision (version) number. If this argument is omitted, it will
-roll back to the previous release.
+second is a revision (version) number. If this argument is omitted or set
+to 0, it willroll back to the previous release.
 
 To see revision numbers, run 'helm history RELEASE'.
 `