diff --git a/rips/rustchain-core/src/mutator_oracle/multi_arch_oracles.py b/rips/rustchain-core/src/mutator_oracle/multi_arch_oracles.py
index 5f51f3a15..0a4a50bc9 100644
--- a/rips/rustchain-core/src/mutator_oracle/multi_arch_oracles.py
+++ b/rips/rustchain-core/src/mutator_oracle/multi_arch_oracles.py
@@ -51,6 +51,7 @@
 import hashlib
 import struct
 import secrets
+import hmac
 import time
 from datetime import datetime
 
@@ -289,7 +290,7 @@ def generate_mutation_seed(self, block_height: int) -> Optional[MultiArchMutatio
             final_seed,
             b''.join(a.encode() for a in sorted(contributions.keys())),
             hashlib.sha256
-        ).digest() if 'hmac' in dir() else hashlib.sha256(final_seed).digest()
+        ).digest()
 
         seed = MultiArchMutationSeed(
             seed=final_seed,