diff --git a/lib/config.php b/lib/config.php
index 7344f93..e1b4485 100644
--- a/lib/config.php
+++ b/lib/config.php
@@ -61,22 +61,27 @@ function config_read() {
 
 function config_write() {
     assert(PHPL_CONFIG);
-    global $_CONFIG;
+    global $_CONFIG, $_MODULES;
 
     $root = new SdlTag();
 
     $items = $root->createChild("items");
     foreach ($_CONFIG['items'] as $item) {
+        $opts = array_map(function ($opt) { return $opt->name; }, $_MODULES[$item[0]]->opts);
         $conf = $items->createChild($item[0]);
         $conf->setValue($item[1]);
         foreach ($item[2] as $k=>$v) {
-            $conf->setAttribute($k,$v);
+            if (in_array($k,$opts)) {
+                $conf->setAttribute($k,$v);
+            } else
+                printf("Warning: No such option %s for %s\n", $k, $item[0]);
         }
     }
 
     $root->createChild("theme")->setValue($_CONFIG['theme']);
 
     file_put_contents(PHPL_CONFIG, $root->encode());
+    config_read();
 }
 
 function config_item_delete($name) {
diff --git a/modules/text.php b/modules/text.php
index 8f5aee2..23974d0 100644
--- a/modules/text.php
+++ b/modules/text.php
@@ -1,11 +1,13 @@
 <?php
 
 define("TEXT_TEXT", "text");
+define("TEXT_CLASS", "class");
 
 function _text(array $opts) {
     $attr = [];
-    if ($opts['class']) $attr['class'] = $opts['class'];
-    return panel($opts['text'], $attr, 'text');
+    if ($opts[TEXT_CLASS]) $attr['class'] = $opts[TEXT_CLASS];
+    return panel($opts[TEXT_TEXT], $attr, 'text');
 }
 module("text", "Show a text");
 option("text", TEXT_TEXT, "string", "The text to dispaly", "Text");
+option("class", TEXT_CLASS, "string", "The class to use", "");
\ No newline at end of file