diff --git a/bin/addons/base/ir/ir_model.py b/bin/addons/base/ir/ir_model.py
index 15a4072195a..bbc56103f33 100644
--- a/bin/addons/base/ir/ir_model.py
+++ b/bin/addons/base/ir/ir_model.py
@@ -87,7 +87,6 @@ class ir_model_access(osv.osv):
 		'perm_unlink': fields.boolean('Delete Permission'),
 	}
 	def check(self, cr, uid, model_name, mode='read'):
-		return True
 		assert mode in ['read','write','create','unlink'], 'Invalid access mode for security'
 		if uid==1:
 			return True