diff --git a/product/ERP5Type/patches/PropertyManager.py b/product/ERP5Type/patches/PropertyManager.py
index e47bb1264f02e260727202673acf188d425fa5d5..517237449dd531de743bd20d4b51f89ca91066ab 100644
--- a/product/ERP5Type/patches/PropertyManager.py
+++ b/product/ERP5Type/patches/PropertyManager.py
@@ -92,7 +92,7 @@ def PropertyManager_setProperty(self, id, value, type=None):
       elif isinstance(value, float):
         type = 'float'
       elif isinstance(value, basestring):
-        if len(value_type.split('\n')) > 1:
+        if len(value.split('\n')) > 1:
           type = 'text'
         else:
           type = 'string'