diff --git a/views/booking_event.xml b/views/booking_event.xml
index c964538..85bac49 100755
--- a/views/booking_event.xml
+++ b/views/booking_event.xml
@@ -90,7 +90,7 @@
             </xpath>
              
             <xpath expr="//page[@name='tickets']" position="before">
-            <page string="Prices" name="booking" attrs="{'invisible':['|',('booking_event','=',False)]}">
+            <page string="Prices" name="booking" attrs="{'invisible':[('booking_event','=',False)]}">
             <group style="width:25%%">
             
             <field name="booking_product_id" attrs="{'required': [('booking_event','=', True)]}"/>