diff --git a/core/src/execution/datafusion/planner.rs b/core/src/execution/datafusion/planner.rs
index 7a37e3aae..a0b75de3f 100644
--- a/core/src/execution/datafusion/planner.rs
+++ b/core/src/execution/datafusion/planner.rs
@@ -779,7 +779,7 @@ impl PhysicalPlanner {
                     .iter()
                     .enumerate()
                     .map(|(idx, expr)| {
-                        self.create_expr(expr, child.schema())
+                        self.create_expr(expr, aggregate.schema())
                             .map(|r| (r, format!("col_{}", idx)))
                     })
                     .collect();