diff --git a/tests/ftpserver.pl b/tests/ftpserver.pl
index 2aba4263a2..77d0b6faf4 100755
--- a/tests/ftpserver.pl
+++ b/tests/ftpserver.pl
@@ -3023,7 +3023,7 @@ while(1) {
       undef $ftplistparserstate;
     }
     if($ftptargetdir) {
-      undef $ftptargetdir;
+      $ftptargetdir = "";
     }
 
     if($verbose) {