diff --git a/openerp/models.py b/openerp/models.py
index 390941db954..cc0a4979bef 100644
--- a/openerp/models.py
+++ b/openerp/models.py
@@ -907,10 +907,10 @@ class BaseModel(object):
                         if lines2:
                             # merge first line with record's main line
                             for j, val in enumerate(lines2[0]):
-                                if val:
+                                if val or isinstance(val, bool):
                                     current[j] = val
                             # check value of current field
-                            if not current[i]:
+                            if not current[i] and not isinstance(current[i], bool):
                                 # assign xml_ids, and forget about remaining lines
                                 xml_ids = [item[1] for item in value.name_get()]
                                 current[i] = ','.join(xml_ids)