diff --git a/partner_multi_relation/__manifest__.py b/partner_multi_relation/__manifest__.py
index 491f31fb6..a8f4c1739 100644
--- a/partner_multi_relation/__manifest__.py
+++ b/partner_multi_relation/__manifest__.py
@@ -3,7 +3,7 @@
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 {
     "name": "Partner relations",
-    "version": "10.0.1.0.0",
+    "version": "10.0.1.0.1",
     "author": "Therp BV,Camptocamp,Odoo Community Association (OCA)",
     "complexity": "normal",
     "category": "Customer Relationship Management",
diff --git a/partner_multi_relation/models/res_partner.py b/partner_multi_relation/models/res_partner.py
index 3545a299c..f62d872e4 100644
--- a/partner_multi_relation/models/res_partner.py
+++ b/partner_multi_relation/models/res_partner.py
@@ -143,7 +143,8 @@ class ResPartner(models.Model):
         # pylint: disable=no-value-for-parameter
         date_args = []
         for arg in args:
-            if is_leaf(arg) and arg[0].startswith('search_relation'):
+            if (is_leaf(arg) and isinstance(arg[0], basestring) and
+                    arg[0].startswith('search_relation')):
                 if arg[0] == 'search_relation_date':
                     date_args = []
                     break
@@ -155,7 +156,8 @@ class ResPartner(models.Model):
         active_args = []
         if self.env.context.get('active_test', True):
             for arg in args:
-                if is_leaf(arg) and arg[0].startswith('search_relation'):
+                if (is_leaf(arg) and isinstance(arg[0], basestring) and
+                        arg[0].startswith('search_relation')):
                     active_args = [('relation_all_ids.active', '=', True)]
                     break
         return super(ResPartner, self).search(