diff --git a/addons/mrp/report/order.rml b/addons/mrp/report/order.rml
index feb1515218b..5e650740de5 100644
--- a/addons/mrp/report/order.rml
+++ b/addons/mrp/report/order.rml
@@ -294,7 +294,7 @@
       <blockTable colWidths="74.0,212.0,112.0,66.0,64.0" style="Table4">
         <tr>
           <td>
-            <para style="terp_default_Centre_8">[[ line2.sequence ]]</para>
+            <para style="terp_default_Centre_8">[[ str(line2.sequence) ]]</para>
           </td>
           <td>
             <para style="terp_default_Centre_8">[[ line2.name ]]</para>