diff --git a/consumer/speed_controller.go b/consumer/speed_controller.go
index a26cc60..9544fe1 100644
--- a/consumer/speed_controller.go
+++ b/consumer/speed_controller.go
@@ -64,7 +64,7 @@ func (c *fanControl) StartControl() {
 			}
 		}
 		if (!compareFanSpeed(fanSpeedList, newFanSpeedList)) {
-			fanSpeedList = newFanSpeedList
+			copy(fanSpeedList, newFanSpeedList)
 			args := make([]string, 0)
 			args = append(args, "raw", "0x3a", "0x01", )
 			for _, item := range fanSpeedList {
@@ -79,7 +79,7 @@ func (c *fanControl) StartControl() {
 				return
 			}
 			buf := bytes.NewBufferString("")
-			for _, item := range fanSpeedList {
+			for _, item := range newFanSpeedList {
 				buf.WriteString(fmt.Sprintf("0x%x", item))
 				buf.WriteRune(' ')
 			}