--- a/cubicweb/server/test/unittest_ldapsource.py	Wed Oct 19 15:56:35 2016 +0200
+++ b/cubicweb/server/test/unittest_ldapsource.py	Wed Oct 19 15:57:52 2016 +0200
@@ -311,6 +311,24 @@
             self.assertTrue(str(pwd))
 
 
+class LDAPGeneratePwdTC(LDAPFeedTestBase):
+    """
+    A testcase for password generation on CWUser when none is imported
+    """
+
+    def setup_database(self):
+        with self.admin_access.repo_cnx() as cnx:
+            lfsource = cnx.repo.sources_by_uri['ldap']
+            del lfsource.user_attrs['userPassword']
+        super(LDAPGeneratePwdTC, self).setup_database()
+
+    def test_no_password(self):
+        with self.admin_access.repo_cnx() as cnx:
+            cu = cnx.system_sql("SELECT cw_upassword FROM cw_cwuser WHERE cw_login='syt';")
+            pwd = cu.fetchall()[0][0]
+            self.assertTrue(pwd)
+
+
 class LDAPFeedUserDeletionTC(LDAPFeedTestBase):
     """
     A testcase for situations where users are deleted from or

--- a/cubicweb/sobjects/ldapparser.py	Wed Oct 19 15:56:35 2016 +0200
+++ b/cubicweb/sobjects/ldapparser.py	Wed Oct 19 15:57:52 2016 +0200
@@ -25,7 +25,7 @@
 from logilab.common.decorators import cached, cachedproperty
 from logilab.common.shellutils import generate_password
 
-from cubicweb import Binary, ConfigurationError
+from cubicweb import ConfigurationError
 from cubicweb.server.utils import crypt_password
 from cubicweb.server.sources import datafeed
 from cubicweb.dataimport import stores, importer
@@ -149,7 +149,7 @@
                 # generate a dumb password if not fetched from ldap (see
                 # userPassword)
                 pwd = crypt_password(generate_password())
-                attrs['upassword'] = set([Binary(pwd)])
+                attrs['upassword'] = set([pwd])
             extuser = importer.ExtEntity('CWUser', userdict['dn'].encode('ascii'), attrs)
             extuser.values['owned_by'] = set([extuser.extid])
             for extemail in self._process_email(extuser, userdict):