diff --git a/addons/crm/crm.py b/addons/crm/crm.py
index 8271ab025d2..3cebf30f3c3 100644
--- a/addons/crm/crm.py
+++ b/addons/crm/crm.py
@@ -747,7 +747,6 @@ class crm_case(osv.osv):
             data = {'state': 'open', 'active': True}
             if not case.user_id:
                 data['user_id'] = uid
-            data.update({'date_open': time.strftime('%Y-%m-%d %H:%M:%S')})
             self.write(cr, uid, ids, data)
         self._action(cr, uid, cases, 'open')
         return True
diff --git a/addons/crm/crm_lead.py b/addons/crm/crm_lead.py
index 73fd420aa63..8863791a28c 100644
--- a/addons/crm/crm_lead.py
+++ b/addons/crm/crm_lead.py
@@ -23,6 +23,7 @@ from osv import fields, osv, orm
 from datetime import datetime, timedelta
 import crm
 import math
+import time
 from mx import DateTime
 from tools.translate import _
 
@@ -34,6 +35,25 @@ class crm_lead(osv.osv):
     _order = "priority desc, id desc"
     _inherit = ['res.partner.address', 'crm.case']
 
+    def case_open(self, cr, uid, ids, *args):
+        """
+        @param self: The object pointer
+        @param cr: the current row, from the database cursor,
+        @param uid: the current user’s ID for security checks,
+        @param ids: List of case's Ids
+        @param *args: Give Tuple Value
+        """
+
+        cases = self.browse(cr, uid, ids)
+        for case in cases:
+            data = {'state': 'open', 'active': True}
+            if not case.user_id:
+                data['user_id'] = uid
+            data.update({'date_open': time.strftime('%Y-%m-%d %H:%M:%S')})
+            self.write(cr, uid, ids, data)
+        self._action(cr, uid, cases, 'open')
+        return True
+
     def _compute_day(self, cr, uid, ids, fields, args, context={}):
         """
         @param cr: the current row, from the database cursor,
diff --git a/addons/crm/crm_opportunity.py b/addons/crm/crm_opportunity.py
index e11aaedee09..0e635886e1c 100644
--- a/addons/crm/crm_opportunity.py
+++ b/addons/crm/crm_opportunity.py
@@ -40,6 +40,25 @@ class crm_opportunity(osv.osv):
     _order = "id desc"
     _inherit = 'crm.case'
 
+    def case_open(self, cr, uid, ids, *args):
+        """
+        @param self: The object pointer
+        @param cr: the current row, from the database cursor,
+        @param uid: the current user’s ID for security checks,
+        @param ids: List of case's Ids
+        @param *args: Give Tuple Value
+        """
+
+        cases = self.browse(cr, uid, ids)
+        for case in cases:
+            data = {'state': 'open', 'active': True}
+            if not case.user_id:
+                data['user_id'] = uid
+            data.update({'date_open': time.strftime('%Y-%m-%d %H:%M:%S')})
+            self.write(cr, uid, ids, data)
+        self._action(cr, uid, cases, 'open')
+        return True
+
     def _compute_day(self, cr, uid, ids, fields, args, context={}):
         """
         @param cr: the current row, from the database cursor,
diff --git a/addons/project_issue/project_issue.py b/addons/project_issue/project_issue.py
index 248122ad854..f566e357dfd 100644
--- a/addons/project_issue/project_issue.py
+++ b/addons/project_issue/project_issue.py
@@ -37,6 +37,25 @@ class project_issue(osv.osv):
     _order = "priority, id desc"
     _inherit = 'crm.case'
 
+    def case_open(self, cr, uid, ids, *args):
+        """
+        @param self: The object pointer
+        @param cr: the current row, from the database cursor,
+        @param uid: the current user’s ID for security checks,
+        @param ids: List of case's Ids
+        @param *args: Give Tuple Value
+        """
+
+        cases = self.browse(cr, uid, ids)
+        for case in cases:
+            data = {'state': 'open', 'active': True}
+            if not case.user_id:
+                data['user_id'] = uid
+            data.update({'date_open': time.strftime('%Y-%m-%d %H:%M:%S')})
+            self.write(cr, uid, ids, data)
+        self._action(cr, uid, cases, 'open')
+        return True
+
     def _compute_day(self, cr, uid, ids, fields, args, context={}):
         """
         @param cr: the current row, from the database cursor,