diff --git a/pkg/es/index.go b/pkg/es/index.go
index e1ab0f7..e90abf5 100644
--- a/pkg/es/index.go
+++ b/pkg/es/index.go
@@ -336,12 +336,12 @@ func IndexDiskusage(conf *cfg.Config, index string) error {
 		return fmt.Errorf("failed to retrieve index disk usage: %w", esErrorString(err))
 	}
 
-	dures := ResIndexDiskUsage{}
-	if err := json.Unmarshal(res, &dures); err != nil {
+	duRes := ResIndexDiskUsage{}
+	if err := json.Unmarshal(res, &duRes); err != nil {
 		return fmt.Errorf("failed to unmarshal disk usage response: %w", err)
 	}
 
-	du, exists := dures[index]
+	diskusage, exists := duRes[index]
 	if !exists {
 		return errors.New("no disk usage reported for index")
 	}
@@ -349,7 +349,7 @@ func IndexDiskusage(conf *cfg.Config, index string) error {
 	table := printer.NewTableEmpty(conf).
 		WithHeaders("field", "bloom filter", "norms", "points", "term vectors", "knn vectors", "total")
 
-	for name, field := range du.Fields {
+	for name, field := range diskusage.Fields {
 		if strings.HasPrefix(name, "_") || strings.HasSuffix(name, ".keyword") {
 			continue
 		}
@@ -365,7 +365,7 @@ func IndexDiskusage(conf *cfg.Config, index string) error {
 		)
 	}
 
-	all := du.AllFields
+	all := diskusage.AllFields
 
 	table.Sort()