diff --git a/htdocs/admin/modulehelp.php b/htdocs/admin/modulehelp.php
index 68db7450055..50e83f65fcb 100644
--- a/htdocs/admin/modulehelp.php
+++ b/htdocs/admin/modulehelp.php
@@ -167,7 +167,7 @@ foreach ($modulesdir as $dir) {
 										$familyinfo = array_merge($familyinfo, $objMod->familyinfo);
 										$familykey = key($objMod->familyinfo);
 									} else {
-										$familykey = $objMod->family;
+										$familykey = empty($objMod->family) ? 'other' : $objMod->family;
 									}
 
 									$moduleposition = ($objMod->module_position ? $objMod->module_position : '50');
diff --git a/htdocs/admin/modules.php b/htdocs/admin/modules.php
index 5ce0f2042d7..ece8c531fc9 100644
--- a/htdocs/admin/modules.php
+++ b/htdocs/admin/modules.php
@@ -460,7 +460,7 @@ foreach ($modulesdir as $dir) {
 									$arrayofwarningsext[$modName] = $objMod->warnings_activation_ext;
 								}
 
-								$familyposition = (empty($familyinfo[$familykey]['position']) ? 0 : $familyinfo[$familykey]['position']);
+								$familyposition = (empty($familyinfo[$familykey]['position']) ? '0' : $familyinfo[$familykey]['position']);
 								$listOfOfficialModuleGroups = array('hr', 'technic', 'interface', 'technic', 'portal', 'financial', 'crm', 'base', 'products', 'srm', 'ecm', 'projects', 'other');
 								if ($external && !in_array($familykey, $listOfOfficialModuleGroups)) {
 									// If module is extern and into a custom group (not into an official predefined one), it must appear at end (custom groups should not be before official groups).
diff --git a/htdocs/core/modules/DolibarrModules.class.php b/htdocs/core/modules/DolibarrModules.class.php
index 3a73f89ffd9..2994a5c58b0 100644
--- a/htdocs/core/modules/DolibarrModules.class.php
+++ b/htdocs/core/modules/DolibarrModules.class.php
@@ -60,7 +60,7 @@ class DolibarrModules // Can not be abstract, because we need to instantiate it
 	public $editor_url;
 
 	/**
-	 * @var string Family
+	 * @var string 	Family
 	 * @see $familyinfo
 	 *
 	 * Native values: 'crm', 'financial', 'hr', 'projects', 'products', 'ecm', 'technic', 'other'.