diff --git a/addons/purchase/res_config.py b/addons/purchase/res_config.py
index bfe2cdf6bca..ae3a172ce3c 100644
--- a/addons/purchase/res_config.py
+++ b/addons/purchase/res_config.py
@@ -66,6 +66,11 @@ Example: Product: this product is deprecated, do not purchase more than 5.
         'default_invoice_method': 'manual',
     }
 
+    def onchange_purchase_analytic_plans(self, cr, uid, ids, module_purchase_analytic_plans, context=None):
+        """ change group_analytic_account_for_purchases following module_purchase_analytic_plans """
+        if not module_purchase_analytic_plans:
+            return {}
+        return {'value': {'group_analytic_account_for_purchases': module_purchase_analytic_plans}}
 
 
 
@@ -82,6 +87,8 @@ class account_config_settings(osv.osv_memory):
 
     def onchange_purchase_analytic_plans(self, cr, uid, ids, module_purchase_analytic_plans, context=None):
         """ change group_analytic_account_for_purchases following module_purchase_analytic_plans """
+        if not module_purchase_analytic_plans:
+            return {}
         return {'value': {'group_analytic_account_for_purchases': module_purchase_analytic_plans}}
 
 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
diff --git a/addons/purchase/res_config_view.xml b/addons/purchase/res_config_view.xml
index 7f1cfc64f39..276dc892392 100644
--- a/addons/purchase/res_config_view.xml
+++ b/addons/purchase/res_config_view.xml
@@ -67,7 +67,7 @@
                                 <label for="module_purchase_requisition"/>
                             </div>
                             <div>
-                                <field name="module_purchase_analytic_plans" class="oe_inline"/>
+                                <field name="module_purchase_analytic_plans" on_change="onchange_purchase_analytic_plans(module_purchase_analytic_plans, context)" class="oe_inline"/>
                                 <label for="module_purchase_analytic_plans"/>
                             </div>
                             <div>
@@ -109,7 +109,7 @@
                         <label for="group_analytic_account_for_purchases"/>
                     </div>
                     <div>
-                        <field name="module_purchase_analytic_plans" on_change="onchange_purchase_analytic_plans(module_purchase_analytic_plans)" class="oe_inline"/>
+                        <field name="module_purchase_analytic_plans" on_change="onchange_purchase_analytic_plans(module_purchase_analytic_plans, context)" class="oe_inline"/>
                         <label for="module_purchase_analytic_plans"/>
                     </div>
                 </xpath>
diff --git a/addons/sale/res_config.py b/addons/sale/res_config.py
index a693fd11024..f4239b0e1a2 100644
--- a/addons/sale/res_config.py
+++ b/addons/sale/res_config.py
@@ -141,6 +141,8 @@ class account_config_settings(osv.osv_memory):
 
     def onchange_sale_analytic_plans(self, cr, uid, ids, module_sale_analytic_plans, context=None):
         """ change group_analytic_account_for_sales following module_sale_analytic_plans """
+        if not module_sale_analytic_plans:
+            return {}
         return {'value': {'group_analytic_account_for_sales': module_sale_analytic_plans}}
 
 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: