diff --git a/lib/languages b/lib/languages
index fc39ed1547..f004d4b24c 100644
--- a/lib/languages
+++ b/lib/languages
@@ -39,7 +39,7 @@ finnish     finnish	"Finnish"	false  iso8859-15 fi_FI	 ""
 # We redefine \og and \fg (guillemets) for older french language definitions
 french      french 	"French"	false  iso8859-15 fr_FR	 "\addto\extrasfrench{\providecommand{\og}{\leavevmode\flqq~}\providecommand{\fg}{\ifdim\lastskip>\z@\unskip\fi~\frqq}}"
 galician    galician	"Galician"	false  iso8859-15 gl_ES	 ""
-german      german	"German (old spelling)"	false  iso8859-15 de-alt	 ""
+german      german	"German (old spelling)"	false  iso8859-15 de_alt	 ""
 ngerman     ngerman	"German"	false  iso8859-15 de_DE	 ""
 greek       greek	"Greek"		false  iso8859-7  el_GR	 ""
 polutonikogreek polutonikogreek	"Greek (polytonic)"	false  iso8859-7  el_GR	 "\providecommand*{\perispomeni}{\char126}\addto\extraspolutonikogreek{\let\~\perispomeni}\addto\extrasgreek{\let\~\perispomeni}"