diff --git a/mev_inspect/classifiers/specs/zero_ex.py b/mev_inspect/classifiers/specs/zero_ex.py
index 009c34c..4aa2e4e 100644
--- a/mev_inspect/classifiers/specs/zero_ex.py
+++ b/mev_inspect/classifiers/specs/zero_ex.py
@@ -248,7 +248,7 @@ def _get_taker_token_in_amount(
             if transfer.to_address == taker_address:
                 return transfer.amount
 
-    raise ValueError("Unable to find transfers matching 0x order.")
+    raise RuntimeError("Unable to find transfers matching 0x order.")
 
 
 def _get_0x_token_in_data(