diff --git a/0018-oracle-arb-fix.md b/0018-oracle-arb-fix.md
index f5d3429e3..f95e55938 100644
--- a/0018-oracle-arb-fix.md
+++ b/0018-oracle-arb-fix.md
@@ -1,4 +1,4 @@
-# HIPxx: Oracle Arbitrage Fix
+# HIP18: Oracle Arbitrage Fix
 
 - Author: [@lthiery](https://github.com/lthiery)
 - Start Date: 2020-10-22