diff --git a/addons/project/project.py b/addons/project/project.py
index a0acb2ac793..41b41a3dfc9 100644
--- a/addons/project/project.py
+++ b/addons/project/project.py
@@ -1089,6 +1089,8 @@ class task(base_stage, osv.osv):
         return True
 
     def create(self, cr, uid, vals, context=None):
+        if context is None:
+            context = {}
         if not context.get('default_project_id', False) and vals.get('project_id', False):
             ctx = context.copy()
             ctx['default_project_id'] = vals['project_id']
diff --git a/addons/project_issue/project_issue.py b/addons/project_issue/project_issue.py
index f4d8e828945..a01e0266f90 100644
--- a/addons/project_issue/project_issue.py
+++ b/addons/project_issue/project_issue.py
@@ -65,6 +65,8 @@ class project_issue(base_stage, osv.osv):
     }
 
     def create(self, cr, uid, vals, context=None):
+        if context is None:
+            context = {}
         if not context.get('default_project_id', False) and vals.get('project_id', False):
             ctx = context.copy()
             ctx['default_project_id'] = vals['project_id']