diff --git a/controllers/admin/AdminCustomersController.php b/controllers/admin/AdminCustomersController.php
index 621e9b765..d4edc5926 100644
--- a/controllers/admin/AdminCustomersController.php
+++ b/controllers/admin/AdminCustomersController.php
@@ -774,7 +774,8 @@ class AdminCustomersControllerCore extends AdminController
 			if ($customer_email != $this->object->email)
 			{
 				$customer = new Customer();
-				$customer->getByEmail($customer_email);
+				if (Validate::isEmail($customer_email))
+					$customer->getByEmail($customer_email);
 				if ($customer->id)
 					$this->errors[] = Tools::displayError('An account already exists for this email address:').' '.$customer_email;
 			}