diff --git a/htdocs/user/card.php b/htdocs/user/card.php
index 8622e293906..cfa89120053 100644
--- a/htdocs/user/card.php
+++ b/htdocs/user/card.php
@@ -450,11 +450,15 @@ if (empty($reshook)) {
 				// Do we update also ->entity ?
 				if (!empty($conf->multicompany->enabled)) {	// If multicompany is not enabled, we never update the entity of a user.
 					if (!empty($conf->global->MULTICOMPANY_TRANSVERSE_MODE)) {
-						$object->entity = 1; // all users are in master entity
+						if (GETPOST('superadmin', 'int') === 1) {
+							$object->entity = 0;
+						} else {
+							$object->entity = 1; // all users are in master entity
+						}
 					} else {
 						// A user should not be able to move a user into another entity. Only superadmin should be able to do this.
 						if ($user->entity == 0 && $user->admin) {
-							if (GETPOST("superadmin")) {
+							if (GETPOST('superadmin', 'int')) {
 								// We try to set the user as superadmin.
 								$object->entity = 0;
 							} else {
diff --git a/htdocs/user/class/user.class.php b/htdocs/user/class/user.class.php
index 9540f082a4c..09bb34ddef3 100644
--- a/htdocs/user/class/user.class.php
+++ b/htdocs/user/class/user.class.php
@@ -1773,7 +1773,9 @@ class User extends CommonObject
 			$sql .= ", salaryextra= ".($this->salaryextra != '' ? "'".$this->db->escape($this->salaryextra)."'" : "null");
 		}
 		$sql .= ", weeklyhours= ".($this->weeklyhours != '' ? "'".$this->db->escape($this->weeklyhours)."'" : "null");
-		$sql .= ", entity = ".((int) $this->entity);
+		if (!empty($user->admin) && empty($user->entity) && $user->id != $this->id) {
+			$sql .= ", entity = ".((int) $this->entity); // entity flag can be set/unset only by an another superadmin user
+		}
 		$sql .= ", default_range = ".($this->default_range > 0 ? $this->default_range : 'null');
 		$sql .= ", default_c_exp_tax_cat = ".($this->default_c_exp_tax_cat > 0 ? $this->default_c_exp_tax_cat : 'null');
 		$sql .= ", fk_warehouse = ".($this->fk_warehouse > 0 ? $this->fk_warehouse : "null");