diff --git a/unit_load.py b/unit_load.py
index 87609c5..dae7db9 100644
--- a/unit_load.py
+++ b/unit_load.py
@@ -213,7 +213,7 @@ class UnitLoad(ModelSQL, ModelView):
     currency_digits = fields.Function(fields.Integer('Currency Digits'),
         'get_currency_digits')
     pallet_product = fields.Function(fields.Many2One('product.product',
-        'Pallet Product'), 'get_pallet_product')
+        'Pallet Product'), 'on_change_with_pallet_product')
     case_product = fields.Function(fields.Many2One('product.product',
         'Case Product'), 'get_case_product')
     _product_category_cache = Cache('stock.unit_load.product_category_cache',
@@ -1169,11 +1169,13 @@ class UnitLoad(ModelSQL, ModelView):
 
         return product and product.id
 
-    def get_pallet_product(self, name=None):
+    @fields.depends(methods=['_get_product_by_category'])
+    def on_change_with_pallet_product(self, name=None):
         product = self._get_product_by_category('pallet_category')
 
         return product and product.id
 
+    @fields.depends('production_moves', 'production_moves')
     def _get_product_by_category(self, category_name):
         pool = Pool()
         Category = pool.get('product.category')
@@ -1409,11 +1411,13 @@ class UnitLoad(ModelSQL, ModelView):
         return [m for m in self.production_moves
             if m.to_location.type == 'production']
 
-    @fields.depends('product', methods=['explode_production_moves'])
+    @fields.depends('product', methods=['explode_production_moves',
+        'on_change_with_pallet_product'])
     def on_change_product(self):
         if self.product:
             self.uom = self.product.default_uom
             self.uom_category = self.uom.category
+            self.pallet_product = self.on_change_with_pallet_product()
         self.explode_production_moves()
 
     @fields.depends(methods=['get_quantity_per_case',