diff --git a/trytond/backend/sqlite/database.py b/trytond/backend/sqlite/database.py
index 1e78b75e2d..32eb4638b2 100644
--- a/trytond/backend/sqlite/database.py
+++ b/trytond/backend/sqlite/database.py
@@ -81,6 +81,8 @@ def date_trunc(_type, date):
                 tm_tuple.tm_mday)
 
 def split_part(text, delimiter, count):
+    if text is None:
+        return None
     return (text.split(delimiter) + [''] * (count - 1))[count - 1]
 
 def replace(text, pattern, replacement):
diff --git a/trytond/model/fields/property.py b/trytond/model/fields/property.py
index cb493c3e08..87033c5183 100644
--- a/trytond/model/fields/property.py
+++ b/trytond/model/fields/property.py
@@ -101,10 +101,10 @@ class Property(Function):
               ' THEN '  + \
                 self.get_condition(sql_type, clause) + \
               ' ELSE '\
-                'FALSE '\
+                '%s '\
               'END',
             [model._name, name] + property_val + \
-                    self.get_condition_args(clause))
+                    self.get_condition_args(clause) + [False])
 
         props = cursor.fetchall()
         default = None