diff --git a/cmd/mp707/main.go b/cmd/mp707/main.go
index b02e2f7..99ce04e 100644
--- a/cmd/mp707/main.go
+++ b/cmd/mp707/main.go
@@ -37,6 +37,8 @@ func main() {
 		}
 
 		for _, device := range devices {
+			defer device.Close()
+
 			if *deviceId > 0 {
 				if device.GetId() != uint8(*deviceId) {
 					log.Println("skipping device", device.GetId())