diff --git a/htdocs/langs/en_US/admin.lang b/htdocs/langs/en_US/admin.lang
index 81034e4aacd..0cf17545b5f 100644
--- a/htdocs/langs/en_US/admin.lang
+++ b/htdocs/langs/en_US/admin.lang
@@ -2194,4 +2194,4 @@ LanguageAndPresentation=Language and presentation
 SkinAndColors=Skin and colors
 IfYouUseASecondTaxYouMustSetYouUseTheMainTax=If you want to use a second tax, you must enable also the first sales tax
 IfYouUseAThirdTaxYouMustSetYouUseTheMainTax=If you want to use a third tax, you must enable also the first sales tax
-PDF_USE_1A=Generate PDF with PDF/A- 1b format
+PDF_USE_1A=Generate PDF with PDF/A-1b format