diff --git a/move.py b/move.py
index fb01475fc1..043a429c74 100644
--- a/move.py
+++ b/move.py
@@ -207,9 +207,9 @@ class Reconciliation(OSV):
     def __init__(self):
         super(Reconciliation, self).__init__()
         self._constraints += [
-            ('check_lines', 'You can not create reconciliation \n' \
-                    'where lines are not balanced, not valid, \n' \
-                    'not in the same account, not in account to reconcile!',
+            ('check_lines', 'You can not create reconciliation ' \
+                    'where lines are not balanced, nor valid, ' \
+                    'nor in the same account, nor in account to reconcile!',
                     ['lines']),
         ]
 
@@ -226,6 +226,9 @@ class Reconciliation(OSV):
                     cursor)
         return res
 
+    def write(self, cursor, user, ids, vals, context=None):
+        raise ExceptORM('UserError', 'You can not modify a reconciliation!')
+
     def check_lines(self, cursor, user, ids):
         currency_obj = self.pool.get('account.currency')
         for reconciliation in self.browse(cursor, user, ids):
@@ -1006,6 +1009,51 @@ class ReconcileLines(Wizard):
 ReconcileLines()
 
 
+class UnreconcileLinesInit(WizardOSV):
+    'Unreconcile Lines Init'
+    _name = 'account.move.unreconcile_lines.init'
+
+UnreconcileLinesInit()
+
+
+class UnreconcileLines(Wizard):
+    'Unreconcile Lines'
+    _name = 'account.move.unreconcile_lines'
+    states = {
+        'init': {
+            'result': {
+                'type': 'form',
+                'object': 'account.move.unreconcile_lines.init',
+                'state': [
+                    ('end', 'Cancel', 'gtk-cancel'),
+                    ('unreconcile', 'Unreconcile', 'gtk-ok', True),
+                ],
+            },
+        },
+        'unreconcile': {
+            'actions': ['_unreconcile'],
+            'result': {
+                'type': 'state',
+                'state': 'end',
+            },
+        },
+    }
+
+    def _unreconcile(self, cursor, user, data, context=None):
+        line_obj = self.pool.get('account.move.line')
+        reconciliation_obj = self.pool.get('account.move.reconciliation')
+
+        lines = line_obj.browse(cursor, user, data['ids'], context=context)
+        reconciliation_ids = [x.reconciliation.id for x in lines \
+                if x.reconciliation]
+        if reconciliation_ids:
+            reconciliation_obj.unlink(cursor, user, reconciliation_ids,
+                    context=context)
+        return {}
+
+UnreconcileLines()
+
+
 class OpenReconcileLinesInit(WizardOSV):
     _name = 'account.move.open_reconcile_lines.init'
     account = fields.Many2One('account.account', 'Account', required=True,
diff --git a/move.xml b/move.xml
index 127d8cab8a..f7b3e070e6 100644
--- a/move.xml
+++ b/move.xml
@@ -299,6 +299,29 @@
             <field name="model">account.move.line,0</field>
             <field name="action" ref="act_reconcile_lines"/>
         </record>
+
+        <record model="ir.ui.view" id="unreconcile_lines_init_view_form">
+            <field name="model">account.move.unreconcile_lines.init</field>
+            <field name="type">form</field>
+            <field name="arch" type="xml">
+                <![CDATA[
+                <form string="Unreconcile" col="2">
+                    <image name="gtk-dialog-info"/>
+                    <label string="If you unreconcile lines, the workflows, on those lines, will not be canceled."/>
+                </form>
+                ]]>
+            </field>
+        </record>
+        <record model="ir.action.wizard" id="act_unreconcile_lines">
+            <field name="name">Unreconcile Lines</field>
+            <field name="wiz_name">account.move.unreconcile_lines</field>
+        </record>
+        <record model="ir.action.keyword" id="act_unreconcile_lines_keyword">
+            <field name="keyword">form_action</field>
+            <field name="model">account.move.line,0</field>
+            <field name="action" ref="act_unreconcile_lines"/>
+        </record>
+
         <record model="ir.action.wizard" id="act_open_reconcile_lines">
             <field name="name">Open Reconcile Lines</field>
             <field name="wiz_name">account.move.open_reconcile_lines</field>