diff --git a/htdocs/user/class/user.class.php b/htdocs/user/class/user.class.php
index 7c4e9a76712..9cbfb403397 100644
--- a/htdocs/user/class/user.class.php
+++ b/htdocs/user/class/user.class.php
@@ -1207,6 +1207,7 @@ class User extends CommonObject
 		$sql .= " ".$this->db->prefix()."usergroup_user as gu,";
 		$sql .= " ".$this->db->prefix()."rights_def as r";
 		$sql .= " WHERE r.id = gr.fk_id";
+		// A very strange business rules. Must be same than into user->getrights() user/perms.php and user/group/perms.php
 		if (!empty($conf->global->MULTICOMPANY_BACKWARD_COMPATIBILITY)) {
 			if (isModEnabled('multicompany') && !empty($conf->global->MULTICOMPANY_TRANSVERSE_MODE)) {
 				$sql .= " AND gu.entity IN (0,".$conf->entity.")";
@@ -1215,12 +1216,13 @@ class User extends CommonObject
 			}
 		} else {
 			$sql .= " AND gr.entity = ".((int) $conf->entity);	// Only groups created in current entity
-			// The entity on the table usergroup_user should be useless and shoumd never be used because it is alreay into gr and r.
+			// The entity on the table usergroup_user should be useless and should never be used because it is alreay into gr and r.
 			// but when using MULTICOMPANY_TRANSVERSE_MODE, we may insert record that make rubbish result due to duplicate record of
 			// other entities, so we are forced to add a filter here
 			$sql .= " AND gu.entity IN (0,".$conf->entity.")";
 			$sql .= " AND r.entity = ".((int) $conf->entity);	// Only permission of modules enabled in current entity
 		}
+		// End of strange business rule
 		$sql .= " AND gr.fk_usergroup = gu.fk_usergroup";
 		$sql .= " AND gu.fk_user = ".((int) $this->id);
 		$sql .= " AND r.perms IS NOT NULL";
diff --git a/htdocs/user/perms.php b/htdocs/user/perms.php
index 1cd094d882d..17bd708f2e0 100644
--- a/htdocs/user/perms.php
+++ b/htdocs/user/perms.php
@@ -216,13 +216,29 @@ if ($result) {
 	dol_print_error($db);
 }
 
-// Lecture des droits groupes
+// Read the permissions of a user inherited by its groups
 $permsgroupbyentity = array();
 
-$sql = "SELECT DISTINCT gr.fk_id, gu.entity";
+$sql = "SELECT DISTINCT gr.fk_id, gu.entity";	// fk_id are permission id and entity is entity of the group
 $sql .= " FROM ".MAIN_DB_PREFIX."usergroup_rights as gr,";
-$sql .= " ".MAIN_DB_PREFIX."usergroup_user as gu";
-$sql .= " WHERE gr.entity = ".((int) $entity);
+$sql .= " ".MAIN_DB_PREFIX."usergroup_user as gu";	// all groups of a user
+$sql .= " WHERE 1 = 1";
+// A very strange business rules. Must be same than into user->getrights() user/perms.php and user/group/perms.php
+if (!empty($conf->global->MULTICOMPANY_BACKWARD_COMPATIBILITY)) {
+	if (isModEnabled('multicompany') && !empty($conf->global->MULTICOMPANY_TRANSVERSE_MODE)) {
+		$sql .= " AND gu.entity IN (0,".$conf->entity.")";
+	} else {
+		//$sql .= " AND r.entity = ".((int) $conf->entity);
+	}
+} else {
+	$sql .= " AND gr.entity = ".((int) $conf->entity);	// Only groups created in current entity
+	// The entity on the table usergroup_user should be useless and should never be used because it is alreay into gr and r.
+	// but when using MULTICOMPANY_TRANSVERSE_MODE, we may insert record that make rubbish result due to duplicate record of
+	// other entities, so we are forced to add a filter here
+	$sql .= " AND gu.entity IN (0,".$conf->entity.")";
+	//$sql .= " AND r.entity = ".((int) $conf->entity);	// Only permission of modules enabled in current entity
+}
+// End of strange business rule
 $sql .= " AND gr.fk_usergroup = gu.fk_usergroup";
 $sql .= " AND gu.fk_user = ".((int) $object->id);
 
@@ -245,6 +261,7 @@ if ($result) {
 }
 
 
+
 /*
  * Part to add/remove permissions
  */
@@ -496,6 +513,15 @@ if ($result) {
 		$isexpanded = ! $ishidden;
 		//var_dump("isexpanded=".$isexpanded);
 
+		$permsgroupbyentitypluszero = array();
+		if (!empty($permsgroupbyentity[0])) {
+			$permsgroupbyentitypluszero = array_merge($permsgroupbyentitypluszero, $permsgroupbyentity[0]);
+		}
+		if (!empty($permsgroupbyentity[$entity])) {
+			$permsgroupbyentitypluszero = array_merge($permsgroupbyentitypluszero, $permsgroupbyentity[$entity]);
+		}
+		//var_dump($permsgroupbyentitypluszero);
+
 		// Break found, it's a new module to catch
 		if (isset($obj->module) && ($oldmod <> $obj->module)) {
 			$oldmod = $obj->module;
@@ -603,8 +629,8 @@ if ($result) {
 				//print img_picto($langs->trans("Active"), 'tick');
 			}
 			print '</td>';
-		} elseif (isset($permsgroupbyentity[$entity]) && is_array($permsgroupbyentity[$entity])) {
-			if (in_array($obj->id, $permsgroupbyentity[$entity])) {	// Permission granted by group
+		} elseif (isset($permsgroupbyentitypluszero) && is_array($permsgroupbyentitypluszero)) {
+			if (in_array($obj->id, $permsgroupbyentitypluszero)) {	// Permission granted by group
 				if ($caneditperms) {
 					print '<td class="center">';
 					print $form->textwithtooltip($langs->trans("Inherited"), $langs->trans("PermissionInheritedFromAGroup"));