diff --git a/channels.cfg b/channels.cfg
index 655d0a36a..44718e9b4 100644
--- a/channels.cfg
+++ b/channels.cfg
@@ -15,7 +15,7 @@ branch_aports=3.15-stable
 mirrordir_alpine=v3.15
 
 [v21.06]
-description=Old release
+description=Old release (unsupported)
 branch_pmaports=v21.06
 branch_aports=3.14-stable
 mirrordir_alpine=v3.14