diff --git a/src/openstatspec/sql/workflow.py b/src/openstatspec/sql/workflow.py
index 41dbe14..dca804c 100644
--- a/src/openstatspec/sql/workflow.py
+++ b/src/openstatspec/sql/workflow.py
@@ -1218,7 +1218,7 @@ def typed(value: Any, kind: str) -> dict[str, str]:
         encoded = [typed(row[0], "integer")]
         encoded.extend(
             typed(value, variable["storage_kind"])
-            for value, variable in zip(tuple(row)[1:], variables)
+            for value, variable in zip(row[1:], variables)
         )
         if not first:
             digest.update(b",")