diff --git a/dist/angular-form-builder.js b/dist/angular-form-builder.js
index 55f3c77..b3739c6 100644
--- a/dist/angular-form-builder.js
+++ b/dist/angular-form-builder.js
@@ -1303,7 +1303,9 @@
     $validator.register('text', {
       invoke: 'watch',
       validator: function(value, scope, element, attrs, $injector) {
-        return scope.minLength === 0 || (value.length >= scope.minLength && value.length <= scope.maxLength);
+        var val;
+        val = value || '';
+        return scope.minLength === 0 || (val.length >= scope.minLength && val.length <= scope.maxLength);
       }
     });
     return $validator.register('numberRange', {
diff --git a/src/module.coffee b/src/module.coffee
index e7ca87b..41a4660 100644
--- a/src/module.coffee
+++ b/src/module.coffee
@@ -3,7 +3,8 @@ angular.module 'builder', ['builder.directive']
         $validator.register('text', {
                 invoke: 'watch'
                 validator: (value, scope, element, attrs, $injector) ->
-                    scope.minLength is 0 || (value.length >= scope.minLength && value.length <= scope.maxLength)
+                    val = value || ''
+                    scope.minLength is 0 || (val.length >= scope.minLength && val.length <= scope.maxLength)
             })
         $validator.register('numberRange', {
                 invoke: 'watch'