diff --git a/packing.py b/packing.py
index 0b01f32614..3c51642e1e 100644
--- a/packing.py
+++ b/packing.py
@@ -84,6 +84,15 @@ class PackingIn(OSV):
     def default_state(self, cursor, user, context=None):
         return 'draft'
 
+    def default_warehouse(self, cursor, user, context=None):
+        location_obj = self.pool.get('stock.location')
+        location_ids = location_obj.search(cursor, user,
+                self.warehouse._domain, context=context)
+        if len(location_ids) == 1:
+            return location_obj.name_get(cursor, user, location_ids,
+                    context=context)[0]
+        return False
+
     def on_change_supplier(self, cursor, user, ids, values, context=None):
         if not values.get('supplier'):
             return {}
@@ -342,6 +351,15 @@ class PackingOut(OSV):
     def default_state(self, cursor, user, context=None):
         return 'draft'
 
+    def default_warehouse(self, cursor, user, context=None):
+        location_obj = self.pool.get('stock.location')
+        location_ids = location_obj.search(cursor, user,
+                self.warehouse._domain, context=context)
+        if len(location_ids) == 1:
+            return location_obj.name_get(cursor, user, location_ids,
+                    context=context)[0]
+        return False
+
     def on_change_customer(self, cursor, user, ids, values, context=None):
         if not values.get('customer'):
             return {}