diff --git a/mev_inspect/classifiers/specs/zero_ex.py b/mev_inspect/classifiers/specs/zero_ex.py
index 1f902c3..830c8b7 100644
--- a/mev_inspect/classifiers/specs/zero_ex.py
+++ b/mev_inspect/classifiers/specs/zero_ex.py
@@ -52,7 +52,7 @@ class ZeroExSwapClassifier(SwapClassifier):
             block_number=trace.block_number,
             trace_address=trace.trace_address,
             contract_address=contract_address,
-            protocol=trace.protocol,
+            protocol=Protocol.zero_ex,
             from_address=trace.from_address,
             to_address=trace.to_address,
             token_in_address=token_in_address,