diff --git a/apps/treasury/templatetags/escape_tex.py b/apps/treasury/templatetags/escape_tex.py
index 7cc41fb5..3d635690 100644
--- a/apps/treasury/templatetags/escape_tex.py
+++ b/apps/treasury/templatetags/escape_tex.py
@@ -16,10 +16,5 @@ def do_latex_escape(value):
     )
 
 
-def fp_value(value):
-    return value.replace("-", "").replace("-", "neg")
-
-
 register = template.Library()
 register.filter("escape_tex", do_latex_escape)
-register.filter("fp_value", fp_value)
diff --git a/templates/treasury/invoice_sample.tex b/templates/treasury/invoice_sample.tex
index d1b045ac..cf79029e 100644
--- a/templates/treasury/invoice_sample.tex
+++ b/templates/treasury/invoice_sample.tex
@@ -31,7 +31,8 @@
 \newcommand{\AfficheResultat}{%
     \ListeProduits
 
-    \FPeval{\TotalTVA}{\TotalHT * \TVA / 100}
+    \FPmul{\TotalTVA}{\TotalHT}{\TVA}
+    \FPdiv{\TotalTVA}{\TotalTVA}{100}
     \FPadd{\TotalTTC}{\TotalHT}{\TotalTVA}
     \FPround{\TotalHT}{\TotalHT}{2}
     \FPround{\TotalTVA}{\TotalTVA}{2}
@@ -98,7 +99,7 @@
 % Liste des produits facturés : Désignation, quantité, prix unitaire HT
 
 {% for product in products %}
-\AjouterProduit{ {{ product.designation|safe|escape_tex }}} { {{ product.quantity|safe|escape_tex|fp_value }}} { {{ product.amount_euros|safe|escape_tex|fp_value }}} { {{ product.total_euros|safe|escape_tex|fp_value }}}
+\AjouterProduit{{"{"}}{{ product.designation|safe|escape_tex }}} {{"{"}}{{ product.quantity|safe|escape_tex }}} {{"{"}}{{ product.amount_euros|safe|escape_tex }}} {{"{"}}{{ product.total_euros|safe|escape_tex }}}
 {% endfor %}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%