diff --git a/benchmarks/src/bin/h2o.rs b/benchmarks/src/bin/h2o.rs
index 4dba1dda77ef..88f4084e87a5 100644
--- a/benchmarks/src/bin/h2o.rs
+++ b/benchmarks/src/bin/h2o.rs
@@ -89,7 +89,7 @@ async fn group_by(opt: &GroupBy) -> Result<()> {
             MemTable::load(Arc::new(csv), Some(partition_size), &ctx.state()).await?;
         ctx.register_table("x", Arc::new(memtable))?;
     } else {
-        ctx.register_csv("x", path, CsvReadOptions::default())
+        ctx.register_csv("x", path, CsvReadOptions::default().schema(&schema))
             .await?;
     }