diff --git a/device.go b/device.go
index 2257458..6a887ea 100644
--- a/device.go
+++ b/device.go
@@ -257,7 +257,7 @@ func (nc *NetCard) runWrite() {
 			log.Panic(err)
 		}
 
-		log.Printf("get wframes decode len: %d", len(bufs))
+		log.Printf("get wframes decode len: %d", len(bufs[0]))
 
 		for _, buf := range bufs {
 			_, err := ifce.Write(buf)