diff --git a/terminal.go b/terminal.go
index 18379a9..9a88759 100644
--- a/terminal.go
+++ b/terminal.go
@@ -617,7 +617,7 @@
 			if _, err = w.Write(crlf); err != nil {
 				return n, err
 			}
-			n += 1
+			n++
 			buf = buf[1:]
 		}
 	}