diff --git a/src/js/controller.js b/src/js/controller.js
index e741796..2c05b7d 100644
--- a/src/js/controller.js
+++ b/src/js/controller.js
@@ -70,7 +70,7 @@ angular.module('focaAbmChofer')
                 } else if (!/^([\d]{7,10})$/.test(chofer.telefono)) {
                     focaModalService.alert('El campo Teléfono debe tener de 7 a 10 digitos');
                     return
-                } else if (chofer.dni < 7 || chofer.dni > 12) {
+                } else if (chofer.dni.length < 7 || chofer.dni.length > 12) {
                     focaModalService.alert('El campo Documento debe tener de 7 a 12 digitos');
                     return
                 }