diff --git a/addons/l10n_nl/data/account_tax_report_data.xml b/addons/l10n_nl/data/account_tax_report_data.xml
index 25cef8a02b8..89c5d48a913 100644
--- a/addons/l10n_nl/data/account_tax_report_data.xml
+++ b/addons/l10n_nl/data/account_tax_report_data.xml
@@ -215,7 +215,7 @@
         <field name="report_id" ref="tax_report"/>
         <field name="sequence" eval="1"/>
         <field name="parent_id" ref="tax_report_rub_btw_5"/>
-        <field name="formula">NLTAX_B1 + NLTAX_B2 + abs(NLTAX_B4a) + abs(NLTAX_B4b)</field>
+        <field name="formula">NLTAX_B1 + NLTAX_B2 + NLTAX_B4a + NLTAX_B4b</field>
     </record>
 
     <record id="tax_report_rub_btw_5b" model="account.tax.report.line">