diff --git a/addons/stock/stock.py b/addons/stock/stock.py
index 36f024e16e1..6acde78f419 100644
--- a/addons/stock/stock.py
+++ b/addons/stock/stock.py
@@ -529,9 +529,8 @@ class stock_tracking(osv.osv):
         @param context: A standard dictionary
         @return: A dictionary of values
         """
-        value={}
-        value=self.pool.get('action.traceability').action_traceability(cr,uid,ids,context)
-        return value
+        return self.pool.get('action.traceability').action_traceability(cr,uid,ids,context)
+
 stock_tracking()
 
 #----------------------------------------------------------
diff --git a/addons/stock/stock_view.xml b/addons/stock/stock_view.xml
index 29f0170c47b..f4409cd90b4 100644
--- a/addons/stock/stock_view.xml
+++ b/addons/stock/stock_view.xml
@@ -217,9 +217,9 @@
                     <group col="2" colspan="2">
                         <separator string="Traceability" colspan="4"/>
                         <button name="action_traceability" icon="gtk-go-up" string="Upstream traceability" type="object"
-                            context="{'type': '','field': ''}" colspan="2"/>
+                             colspan="2"/>
                         <button name="action_traceability" icon="gtk-go-down" string="Downstream traceability" type="object"
-                            context="{'type': 'move_history_ids','field': ''}" colspan="2"/>
+                            context="{'type': 'move_history_ids'}" colspan="2"/>
                     </group>
                     <notebook colspan="4">
                         <page string="Stock Moves">