diff --git a/sec/com/slack.hoon b/sec/com/slack.hoon
index 766f272dfa..45facdf012 100644
--- a/sec/com/slack.hoon
+++ b/sec/com/slack.hoon
@@ -6,7 +6,7 @@
 ::
 ::::
   ::
-|_  {bal/(bale keys:oauth2) tok/token:oauth2}
+|_  {bal/(bale:eyre keys:oauth2) tok/token:oauth2}
 ::  ++aut is a "standard oauth2" core, which implements the
 ::  most common handling of oauth2 semantics. see lib/oauth2 for more details,
 ::  and examples at the bottom of the file.