diff --git a/go/vt/vtgate/engine/plan_description.go b/go/vt/vtgate/engine/plan_description.go
index 59c60c39dc7..e8e763c1ee1 100644
--- a/go/vt/vtgate/engine/plan_description.go
+++ b/go/vt/vtgate/engine/plan_description.go
@@ -200,6 +200,7 @@ func (pd PrimitiveDescription) Equals(other PrimitiveDescription) string {
 		return fmt.Sprintf("OperatorType: %v != %v", pd.OperatorType, other.OperatorType)
 	}
 
+	// TODO (harshit): enable this to compare keyspace as well
 	// switch {
 	// case pd.Keyspace == nil && other.Keyspace == nil:
 	// 	// do nothing