diff --git a/lam/templates/lists/listdomains.php b/lam/templates/lists/listdomains.php
index adea722a..1b3f9cad 100644
--- a/lam/templates/lists/listdomains.php
+++ b/lam/templates/lists/listdomains.php
@@ -50,8 +50,8 @@ $scope = 'domain';
 // copy HTTP-GET variables to HTTP-POST
 $_POST = $_POST + $_GET;
 
-$info = $_SESSION[$scope . 'info'];
-$units = $_SESSION[$scope . '_units'];
+if (isset($_SESSION[$scope . 'info'])) $info = $_SESSION[$scope . 'info'];
+if (isset($_SESSION[$scope . '_units'])) $units = $_SESSION[$scope . '_units'];
 
 // check if button was pressed and if we have to add/delete a domain
 if (isset($_POST['new']) || isset($_POST['del'])){
diff --git a/lam/templates/lists/listgroups.php b/lam/templates/lists/listgroups.php
index d241d28e..2aca8315 100644
--- a/lam/templates/lists/listgroups.php
+++ b/lam/templates/lists/listgroups.php
@@ -54,8 +54,8 @@ $scope = 'group';
 // copy HTTP-GET variables to HTTP-POST
 $_POST = $_POST + $_GET;
 
-$info = $_SESSION[$scope . 'info'];
-$units = $_SESSION[$scope . '_units'];
+if (isset($_SESSION[$scope . 'info'])) $info = $_SESSION[$scope . 'info'];
+if (isset($_SESSION[$scope . '_units'])) $units = $_SESSION[$scope . '_units'];
 
 listDoPost($scope);
 
diff --git a/lam/templates/lists/listhosts.php b/lam/templates/lists/listhosts.php
index c740068b..ba3284ed 100644
--- a/lam/templates/lists/listhosts.php
+++ b/lam/templates/lists/listhosts.php
@@ -54,8 +54,8 @@ $scope = 'host';
 // copy HTTP-GET variables to HTTP-POST
 $_POST = $_POST + $_GET;
 
-$info = $_SESSION[$scope . 'info'];
-$units = $_SESSION[$scope . '_units'];
+if (isset($_SESSION[$scope . 'info'])) $info = $_SESSION[$scope . 'info'];
+if (isset($_SESSION[$scope . '_units'])) $units = $_SESSION[$scope . '_units'];
 
 listDoPost($scope);