diff --git a/tests/ftpserver.pl b/tests/ftpserver.pl
index be8dea0478..ab8d069b27 100755
--- a/tests/ftpserver.pl
+++ b/tests/ftpserver.pl
@@ -795,7 +795,7 @@ sub EHLO_smtp {
 }
 
 sub QUIT_smtp {
-    sendcontrol "200 byebye";
+    sendcontrol "200 byebye\r\n";
 
     return 0;
 }