diff --git a/CHANGELOG b/CHANGELOG
index 5b13458d3b..5f40e750e5 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Fill default timesheet work from project relate
+
 Version 5.0.0 - 2018-10-01
 * Bug fixes (see mercurial logs for details)
 * Remove support for Python 2.7
diff --git a/__init__.py b/__init__.py
index 9d853241f7..365c4a033d 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,15 +2,16 @@
 # this repository contains the full copyright notices and license terms.
 
 from trytond.pool import Pool
-from .work import *
-from .timesheet import *
+from . import work
+from . import timesheet
 from . import party
 
 
 def register():
     Pool.register(
-        Work,
-        TimesheetWork,
+        work.Work,
+        timesheet.Line,
+        timesheet.Work,
         module='project', type_='model')
     Pool.register(
         party.PartyReplace,
diff --git a/tests/test_project.py b/tests/test_project.py
index 1a9b025402..888bc67500 100644
--- a/tests/test_project.py
+++ b/tests/test_project.py
@@ -129,6 +129,59 @@ class ProjectTestCase(ModuleTestCase):
                 ProjectWork.delete([p_work])
                 self.assertEqual(TimesheetWork.search([]), [])
 
+    @with_transaction()
+    def test_timesheet_default_work_empty(self):
+        "Test timesheet default work with no context"
+        pool = Pool()
+        ProjectWork = pool.get('project.work')
+        TimesheetLine = pool.get('timesheet.line')
+
+        company = create_company()
+        with set_company(company):
+            p_work = ProjectWork()
+            p_work.name = "Work"
+            p_work.timesheet_available = True
+            p_work.save()
+
+            self.assertFalse(TimesheetLine.default_work())
+
+    @with_transaction()
+    def test_timesheet_default_work_single(self):
+        "Test timesheet default work with 1 work in context"
+        pool = Pool()
+        ProjectWork = pool.get('project.work')
+        TimesheetLine = pool.get('timesheet.line')
+
+        company = create_company()
+        with set_company(company):
+            p_work = ProjectWork()
+            p_work.name = "Work"
+            p_work.timesheet_available = True
+            p_work.save()
+
+            with Transaction().set_context({'project.work': [p_work.id]}):
+                self.assertEqual(
+                    TimesheetLine.default_work(),
+                    p_work.timesheet_works[0].id)
+
+    @with_transaction()
+    def test_timesheet_default_work_multiple(self):
+        "Test timesheet default work with multiple work in context"
+        pool = Pool()
+        ProjectWork = pool.get('project.work')
+        TimesheetLine = pool.get('timesheet.line')
+
+        company = create_company()
+        with set_company(company):
+            works = ProjectWork.create([
+                    {'name': "Work 1", 'timesheet_available': True},
+                    {'name': "Work 2", 'timesheet_available': True},
+                    ])
+
+            with Transaction().set_context(
+                    {'project.work': map(int, works)}):
+                self.assertFalse(TimesheetLine.default_work())
+
 
 def suite():
     suite = trytond.tests.test_tryton.suite()
diff --git a/timesheet.py b/timesheet.py
index ff8abc193f..039b51da10 100644
--- a/timesheet.py
+++ b/timesheet.py
@@ -1,22 +1,41 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 from trytond.pool import PoolMeta, Pool
+from trytond.transaction import Transaction
 
 
-__all__ = ['TimesheetWork']
+class Line(metaclass=PoolMeta):
+    __name__ = 'timesheet.line'
+
+    @classmethod
+    def default_work(cls):
+        pool = Pool()
+        Work = pool.get('timesheet.work')
+        try:
+            default = super().default_work()
+        except AttributeError:
+            default = None
+        project_works = Transaction().context.get('project.work')
+        if project_works is not None:
+            works = Work.search([
+                    ('origin.id', 'in', project_works, 'project.work'),
+                    ])
+            if len(works) == 1:
+                default = works[0].id
+        return default
 
 
-class TimesheetWork(metaclass=PoolMeta):
+class Work(metaclass=PoolMeta):
     __name__ = 'timesheet.work'
 
     @classmethod
     def _get_origin(cls):
-        return super(TimesheetWork, cls)._get_origin() + ['project.work']
+        return super()._get_origin() + ['project.work']
 
     def _validate_company(self):
         pool = Pool()
         ProjectWork = pool.get('project.work')
-        result = super(TimesheetWork, self)._validate_company()
+        result = super()._validate_company()
         if isinstance(self.origin, ProjectWork):
             result &= self.company == self.origin.company
         return result
diff --git a/timesheet.xml b/timesheet.xml
index f25b357c91..602020015e 100644
--- a/timesheet.xml
+++ b/timesheet.xml
@@ -9,6 +9,10 @@ this repository contains the full copyright notices and license terms. -->
             <field name="domain"
                 eval="[If(Eval('active_ids', []) == [Eval('active_id')], ('work.origin.id', '=', Eval('active_id'), 'project.work'), ('work.origin.id', 'in', Eval('active_ids'), 'project.work'))]"
                 pyson="1"/>
+            <field
+                name="context"
+                eval="{'project.work': Eval('active_ids')}"
+                pyson="1"/>
         </record>
         <record model="ir.action.keyword"
             id="act_timesheet_line_form_work_keyword1">