diff --git a/config/trees/stable-rt.yaml b/config/trees/stable-rt.yaml
index ae7c6d357..99d2efb7b 100644
--- a/config/trees/stable-rt.yaml
+++ b/config/trees/stable-rt.yaml
@@ -39,3 +39,7 @@ build_configs:
   stable-rt_v6.6-rt:
     <<: *stable-rt
     branch: 'v6.6-rt'
+
+  stable-rt_v6.12-rt:
+    <<: *stable-rt
+    branch: 'v6.12-rt'