diff --git a/channels.cfg b/channels.cfg
index 620e43829..801335604 100644
--- a/channels.cfg
+++ b/channels.cfg
@@ -13,7 +13,7 @@ description=Upcoming stable release (DO NOT USE)
 branch_pmaports=v24.12
 # FIXME: branch_aports=3.21-stable is not available yet
 branch_aports=master
-mirrordir-alpine=v3.21
+mirrordir_alpine=v3.21
 
 [v24.06]
 description=Latest release / Recommended for best stability