diff --git a/cmd/saastool/exp_get.go b/cmd/saastool/exp_get.go
index b92faac..35a61b6 100644
--- a/cmd/saastool/exp_get.go
+++ b/cmd/saastool/exp_get.go
@@ -97,7 +97,7 @@ func RunExpGet(args ...string) error {
 	groupBySlice := []string{}
 	if *groupBy != "" {
 		validGroupBy := map[string]bool{"advertiser_id": true, "user_weight_factor": true}
-		groupBySlice := strings.Split(*groupBy, ",")
+		groupBySlice = strings.Split(*groupBy, ",")
 		for _, group := range groupBySlice {
 			if !validGroupBy[group] {
 				fmt.Fprintln(os.Stderr, "group by error", "group", group)