diff --git a/datafusion/src/physical_plan/group_scalar.rs b/datafusion/src/physical_plan/group_scalar.rs
index 943386d215c4..d5f72b0d7817 100644
--- a/datafusion/src/physical_plan/group_scalar.rs
+++ b/datafusion/src/physical_plan/group_scalar.rs
@@ -24,7 +24,7 @@ use crate::error::{DataFusionError, Result};
 use crate::scalar::ScalarValue;
 
 /// Enumeration of types that can be used in a GROUP BY expression
-#[derive(Debug, PartialEq, Eq, Hash, Clone)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone)]
 pub(crate) enum GroupByScalar {
     Float32(OrderedFloat<f32>),
     Float64(OrderedFloat<f64>),