diff --git a/src/classic/clvm/mod.rs b/src/classic/clvm/mod.rs
index 90433513..f6fc820b 100644
--- a/src/classic/clvm/mod.rs
+++ b/src/classic/clvm/mod.rs
@@ -262,7 +262,7 @@ const KW_PAIRS: [KwAtomPair; 49] = [
         version: 1,
     },
     KwAtomPair {
-        v: &[0x40],
+        v: &[0x3E],
         n: "keccak256",
         version: 2,
     },