diff --git a/addons/hr_payroll/report/report_contribution_register.rml b/addons/hr_payroll/report/report_contribution_register.rml
index 414d3f84282..3cd574645e9 100644
--- a/addons/hr_payroll/report/report_contribution_register.rml
+++ b/addons/hr_payroll/report/report_contribution_register.rml
@@ -222,7 +222,7 @@
           <para style="P15">Total:</para>
         </td>
         <td>
-          <para style="P11">[[ sum_total() or 0.0]] [[o.company_id and o.company_id.currency_id.symbol or '']]</para>
+          <para style="P11">[[ sum_total() or '0.0']] [[o.company_id and o.company_id.currency_id.symbol or '']]</para>
         </td>
       </tr>
     </blockTable>