diff --git a/Cargo.lock b/Cargo.lock
index efd61bb1..b24c765a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -244,7 +244,7 @@ dependencies = [
 [[package]]
 name = "clvmr"
 version = "0.9.1"
-source = "git+https://github.com/Chia-Network/clvm_rs?rev=2f413e72fcf1bcafa4a3117f2c2a0a3a0e7e1c6b#2f413e72fcf1bcafa4a3117f2c2a0a3a0e7e1c6b"
+source = "git+https://github.com/Chia-Network/clvm_rs?rev=fe356d69b556f345b818d605a667596620585a85#fe356d69b556f345b818d605a667596620585a85"
 dependencies = [
  "chia-bls",
  "hex-literal",
diff --git a/Cargo.toml b/Cargo.toml
index 5f2ba3ee..43b954df 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,7 @@ do-notation = "0.1.3"
 serde_json = "1.0"
 sha2 = "0.9.5"
 tempfile = "3.13.0"
-clvmr = { git = "https://github.com/Chia-Network/clvm_rs", rev = "2f413e72fcf1bcafa4a3117f2c2a0a3a0e7e1c6b", features = ["pre-eval"] }
+clvmr = { git = "https://github.com/Chia-Network/clvm_rs", rev = "fe356d69b556f345b818d605a667596620585a85", features = ["pre-eval"] }
 binascii = "0.1.4"
 yaml-rust2 = "0.9"
 hashlink = "0.9.1"
diff --git a/src/classic/clvm_tools/stages/stage_2/operators.rs b/src/classic/clvm_tools/stages/stage_2/operators.rs
index 2396fee7..c00ec1a3 100644
--- a/src/classic/clvm_tools/stages/stage_2/operators.rs
+++ b/src/classic/clvm_tools/stages/stage_2/operators.rs
@@ -363,9 +363,10 @@ impl Dialect for CompilerOperatorsInternal {
     // The softfork operator comes with an extension argument.
     fn softfork_extension(&self, ext: u32) -> OperatorSet {
         match ext {
-            0 => OperatorSet::BLS,
+            0 => OperatorSet::Default,
+            1 => OperatorSet::Keccak,
             // new extensions go here
-            _ => OperatorSet::Default,
+            _ => OperatorSet::Unknown,
         }
     }