diff --git a/web/gui/tarifas/editarTarifasMinimas.zul b/web/gui/tarifas/editarTarifasMinimas.zul
index 48a9052dd..444e61505 100644
--- a/web/gui/tarifas/editarTarifasMinimas.zul
+++ b/web/gui/tarifas/editarTarifasMinimas.zul
@@ -34,7 +34,7 @@
                     <label value="${c:l('busquedaTarifasMinimasController.lhImportetarifa.label')}"/>
                     <textbox id="txtImportancia"
                     value="@{winEditarTarifaMinima$composer.tarifaMinima.importetarifa,converter=com.rjconsultores.ventaboletos.web.utilerias.StringDecimalToDecimalConverter}"
-                    constraint="no empty, no zero, no negative"
+                   constraint="no zero, no negative, /([0-9]+(\,[0-9][0-9]?)?)?/ "
                     use="com.rjconsultores.ventaboletos.web.utilerias.MyTextboxDecimal" precision="9" scale="2" />
                 </row>
                 <row>