diff --git a/plugins/inputs/diskio/diskio.go b/plugins/inputs/diskio/diskio.go
index 79c58ea6606a3..daf97ad1de31b 100644
--- a/plugins/inputs/diskio/diskio.go
+++ b/plugins/inputs/diskio/diskio.go
@@ -118,7 +118,7 @@ func (d *DiskIO) Gather(acc telegraf.Accumulator) error {
 			}
 		}
 
-		fieldsC := map[string]interface{}{
+		fields := map[string]interface{}{
 			"reads":            io.ReadCount,
 			"writes":           io.WriteCount,
 			"read_bytes":       io.ReadBytes,
@@ -135,20 +135,16 @@ func (d *DiskIO) Gather(acc telegraf.Accumulator) error {
 			deltaRWCount := float64(io.ReadCount + io.WriteCount - lastValue.ReadCount - lastValue.WriteCount)
 			deltaRWTime := float64(io.ReadTime + io.WriteTime - lastValue.ReadTime - lastValue.WriteTime)
 			deltaIOTime := float64(io.IoTime - lastValue.IoTime)
-			fieldsG := make(map[string]interface{})
 			if deltaRWCount > 0 {
-				fieldsG["io_await"] = deltaRWTime / deltaRWCount
-				fieldsG["io_svctm"] = deltaIOTime / deltaRWCount
+				fields["io_await"] = deltaRWTime / deltaRWCount
+				fields["io_svctm"] = deltaIOTime / deltaRWCount
 			}
 			itv := float64(collectTime.Sub(d.lastCollectTime).Milliseconds())
 			if itv > 0 {
-				fieldsG["io_util"] = 100 * deltaIOTime / itv
-			}
-			if len(fieldsG) > 0 {
-				acc.AddGauge("diskio", fieldsG, tags)
+				fields["io_util"] = 100 * deltaIOTime / itv
 			}
 		}
-		acc.AddCounter("diskio", fieldsC, tags)
+		acc.AddCounter("diskio", fields, tags)
 	}
 	d.lastCollectTime = collectTime
 	d.lastIOCounterStat = diskio