diff --git a/classes/Module.php b/classes/Module.php
index e3958dcc3..1475ea1c4 100644
--- a/classes/Module.php
+++ b/classes/Module.php
@@ -1534,17 +1534,18 @@ abstract class ModuleCore
 
 	protected function _generateConfigXml()
 	{
-		$xml = '<?xml version="1.0" encoding="UTF-8" ?>
-<module>
-	<name>'.$this->name.'</name>
-	<displayName><![CDATA['.Tools::htmlentitiesUTF8($this->displayName).']]></displayName>
-	<version><![CDATA['.$this->version.']]></version>
-	<description><![CDATA['.Tools::htmlentitiesUTF8($this->description).']]></description>
-	<author><![CDATA['.Tools::htmlentitiesUTF8($this->author).']]></author>
-	<tab><![CDATA['.Tools::htmlentitiesUTF8($this->tab).']]></tab>'.(isset($this->confirmUninstall) ? "\n\t".'<confirmUninstall>'.$this->confirmUninstall.'</confirmUninstall>' : '').'
-	<is_configurable>'.(int)$this->is_configurable.'</is_configurable>
-	<need_instance>'.(int)$this->need_instance.'</need_instance>'.(isset($this->limited_countries) ? "\n\t".'<limited_countries>'.(count($this->limited_countries) == 1 ? $this->limited_countries[0] : '').'</limited_countries>' : '').'
-</module>';
+		$xml = '
+		<?xml version="1.0" encoding="UTF-8" ?>
+        <module>
+            <name>'.$this->name.'</name>
+            <displayName><![CDATA['.Tools::htmlentitiesUTF8($this->displayName).']]></displayName>
+            <version><![CDATA['.$this->version.']]></version>
+            <description><![CDATA['.Tools::htmlentitiesUTF8($this->description).']]></description>
+            <author><![CDATA['.Tools::htmlentitiesUTF8($this->author).']]></author>
+            <tab><![CDATA['.Tools::htmlentitiesUTF8($this->tab).']]></tab>'.(isset($this->confirmUninstall) ? "\n\t".'<confirmUninstall>'.$this->confirmUninstall.'</confirmUninstall>' : '').'
+            <is_configurable>'.(isset($this->is_configurable) ? (int)$this->is_configurable : 0).'</is_configurable>
+            <need_instance>'.(int)$this->need_instance.'</need_instance>'.(isset($this->limited_countries) ? "\n\t".'<limited_countries>'.(count($this->limited_countries) == 1 ? $this->limited_countries[0] : '').'</limited_countries>' : '').'
+        </module>';
 		if (is_writable(_PS_MODULE_DIR_.$this->name.'/'))
 			file_put_contents(_PS_MODULE_DIR_.$this->name.'/config.xml', $xml);
 	}