diff --git a/pkg/madmin/bandwidth.go b/pkg/madmin/bandwidth.go
index 3039cc94b..e0d0da824 100644
--- a/pkg/madmin/bandwidth.go
+++ b/pkg/madmin/bandwidth.go
@@ -29,8 +29,8 @@ import (
 
 // Report includes the bandwidth report or the error encountered.
 type Report struct {
-	Report bandwidth.Report
-	Err    error
+	Report bandwidth.Report `json:"report"`
+	Err    error            `json:"error,omitempty"`
 }
 
 // GetBucketBandwidth - Gets a channel reporting bandwidth measurements for replication buckets. If no buckets