diff --git a/htdocs/langs/en_US/bills.lang b/htdocs/langs/en_US/bills.lang
index e03b31c1929..abd03df051b 100644
--- a/htdocs/langs/en_US/bills.lang
+++ b/htdocs/langs/en_US/bills.lang
@@ -410,6 +410,6 @@ PDFCrabeDescription=Invoice PDF template Crabe. A complete invoice template (rec
 PDFOursinDescription=Invoice PDF template Oursin. A complete invoice template (alternative Template)
 # NumRef Modules
 TerreNumRefModelDesc1=Return number with format %syymm-nnnn for standard invoices and %syymm-nnnn for credit notes where yy is year, mm is month and nnnn is a sequence with no break and no return to 0
-MarsNumRefModelDesc1=Return number with format %syymm-nnnn for standard invoices, %syymm-nnnn for replacement invoices, %syymm-nnnn for credit notes and %syymm-nnnn for credit notes where yy is year, mm is month and nnnn is a sequence with no break and no return to 0
+MarsNumRefModelDesc1=Return number with format %syymm-nnnn for standard invoices, %syymm-nnnn for replacement invoices and %syymm-nnnn for credit notes where yy is year, mm is month and nnnn is a sequence with no break and no return to 0
 
 TerreNumRefModelError=A bill starting with $syymm already exists and is not compatible with this model of sequence. Remove it or rename it to activate this module.