diff --git a/Changes b/Changes
index b6729db..2b44f7d 100644
--- a/Changes
+++ b/Changes
@@ -1,6 +1,9 @@
 ????-??-?? Duncan Ferguson <duncan_ferguson@user.sf.net> - v4.01_00
 * Start switching code to use Exception::Class
 
+2011-07-08 Duncan Ferguson <duncan_ferguson@user.sf.net> - v4.00_10
+* Fix 'uninitialised error' message
+
 2011-06-30 Duncan Ferguson <duncan_ferguson@user.sf.net> - v4.00_09
 * Cater for missing 'pod2text' command (Thanks to Sami Kerola)
 * Fix 'uninitialised variable' error
diff --git a/META.yml b/META.yml
index 213bf98..c8a9215 100644
--- a/META.yml
+++ b/META.yml
@@ -17,7 +17,7 @@ name: App-ClusterSSH
 provides:
   App::ClusterSSH:
     file: lib/App/ClusterSSH.pm
-    version: 4.00_09
+    version: 4.00_10
   App::ClusterSSH::Base:
     file: lib/App/ClusterSSH/Base.pm
     version: 0.02
@@ -40,4 +40,4 @@ resources:
   repository:
     - http://clusterssh.git.sourceforge.net/
     - http://github.com/duncs/clusterssh
-version: 4.00_09
+version: 4.00_10
diff --git a/lib/App/ClusterSSH.pm b/lib/App/ClusterSSH.pm
index 14f028e..be84e1c 100644
--- a/lib/App/ClusterSSH.pm
+++ b/lib/App/ClusterSSH.pm
@@ -3,7 +3,7 @@ package App::ClusterSSH;
 use 5.008.004;
 use warnings;
 use strict;
-use version; our $VERSION = version->new('4.00_09');
+use version; our $VERSION = version->new('4.01_00');
 
 use Carp;
 
@@ -1097,7 +1097,7 @@ sub open_client_windows(@) {
         $servers{$server}{username}       = $username if ($username);
         $servers{$server}{username}       = $username || '';
         $servers{$server}{port}           = $port || '';
-        $servers{$server}{master}         = $config{mstr};
+        $servers{$server}{master}         = $config{mstr} || '';;
         $servers{$server}{master}         = $master if ($master);
 
         logmsg( 2, "Working on server $server for $_" );