diff --git a/htdocs/core/modules/usergroup/doc/doc_generic_usergroup_odt.modules.php b/htdocs/core/modules/usergroup/doc/doc_generic_usergroup_odt.modules.php
index d56d8f8d4d1..df3804670ad 100644
--- a/htdocs/core/modules/usergroup/doc/doc_generic_usergroup_odt.modules.php
+++ b/htdocs/core/modules/usergroup/doc/doc_generic_usergroup_odt.modules.php
@@ -123,7 +123,7 @@ class doc_generic_usergroup_odt extends ModelePDFUserGroup
 		$texte .= '<input type="hidden" name="page_y" value="">';
 		$texte .= '<input type="hidden" name="action" value="setModuleOptions">';
 		$texte .= '<input type="hidden" name="param1" value="USERGROUP_ADDON_PDF_ODT_PATH">';
-		if ($conf->global->MAIN_PROPAL_CHOOSE_ODT_DOCUMENT > 0) {
+		if (!empty($conf->global->MAIN_PROPAL_CHOOSE_ODT_DOCUMENT)) {
 			$texte .= '<input type="hidden" name="param2" value="USERGROUP_ADDON_PDF_ODT_DEFAULT">';
 			$texte .= '<input type="hidden" name="param3" value="USERGROUP_ADDON_PDF_ODT_TOBILL">';
 			$texte .= '<input type="hidden" name="param4" value="USERGROUP_ADDON_PDF_ODT_CLOSED">';
@@ -169,7 +169,7 @@ class doc_generic_usergroup_odt extends ModelePDFUserGroup
 		if (count($listofdir)) {
 			$texte .= $langs->trans("NumberOfModelFilesFound").': <b>'.count($listoffiles).'</b>';
 
-			if ($conf->global->MAIN_PROPAL_CHOOSE_ODT_DOCUMENT > 0) {
+			if (!empty($conf->global->MAIN_PROPAL_CHOOSE_ODT_DOCUMENT)) {
 				// Model for creation
 				$list = ModelePDFUserGroup::liste_modeles($this->db);
 				$texte .= '<table width="50%;">';