diff --git a/docs/ccip-integration/chain138/CHAIN_SELECTOR.md b/docs/ccip-integration/chain138/CHAIN_SELECTOR.md
index ecf4355..3cb1211 100644
--- a/docs/ccip-integration/chain138/CHAIN_SELECTOR.md
+++ b/docs/ccip-integration/chain138/CHAIN_SELECTOR.md
@@ -4,6 +4,8 @@
 **Chain ID**: 138  
 **Network**: DeFi Oracle Meta Mainnet
 
+> **Automation:** Run [`scripts/ccip/calculate-chain-selector.sh`](../../../scripts/ccip/calculate-chain-selector.sh) to compute or verify the Chain 138 selector.
+
 ---
 
 ## Overview