diff --git a/product/ERP5/Document/BusinessTemplate.py b/product/ERP5/Document/BusinessTemplate.py
index ceb93cebe2841d70f879cd236e3c62797d34a73d..ea78f19ad054425e393ccdda3255772e96143f33 100644
--- a/product/ERP5/Document/BusinessTemplate.py
+++ b/product/ERP5/Document/BusinessTemplate.py
@@ -4170,7 +4170,7 @@ Business Template is a set of definitions, such as skins, portal types and categ
 
     security.declareProtected(Permissions.AccessContentsInformation,
                               'getBuildingState')
-    def getBuildingState(self, id_only=1):
+    def getBuildingState(self, default=None, id_only=1):
       """
         Returns the current state in building
       """
@@ -4181,7 +4181,7 @@ Business Template is a set of definitions, such as skins, portal types and categ
 
     security.declareProtected(Permissions.AccessContentsInformation,
                               'getInstallationState')
-    def getInstallationState(self, id_only=1):
+    def getInstallationState(self, default=None, id_only=1):
       """
         Returns the current state in installation
       """