diff --git a/lam/templates/lib/141_jquery-validationEngine-lang.php b/lam/templates/lib/141_jquery-validationEngine-lang.php
index 3b33a7cd..d2428283 100644
--- a/lam/templates/lib/141_jquery-validationEngine-lang.php
+++ b/lam/templates/lib/141_jquery-validationEngine-lang.php
@@ -49,6 +49,10 @@ setlanguage();
                 "numeric": {
                     "regex": /^[0-9]+$/,
                     "alertText": "<?php echo _('Please enter a number.') ?>"
+                },
+                "numericWithNegative": {
+                    "regex": /^[-]?[0-9]+$/,
+                    "alertText": "<?php echo _('Please enter a number.') ?>"
                 }
             };
         }