diff --git a/chain/ethereum/src/codec.rs b/chain/ethereum/src/codec.rs
index 8c7e21f80e7..eb0d1438190 100644
--- a/chain/ethereum/src/codec.rs
+++ b/chain/ethereum/src/codec.rs
@@ -134,7 +134,9 @@ impl Into<web3::types::U64> for TransactionTraceStatus {
 impl Into<Option<web3::types::U64>> for TransactionTraceStatus {
     fn into(self) -> Option<web3::types::U64> {
         match self {
-            Self::Unknown => None,
+            Self::Unknown => {
+                panic!("Got a transaction trace with status UNKNOWN, datasource is broken")
+            }
             Self::Succeeded => Some(web3::types::U64::from(1)),
             Self::Failed => Some(web3::types::U64::from(0)),
             Self::Reverted => Some(web3::types::U64::from(0)),