diff --git a/runtime/spell/nb/main.aap b/runtime/spell/nb/main.aap
index f7805ea..4d445c0 100644
--- a/runtime/spell/nb/main.aap
+++ b/runtime/spell/nb/main.aap
@@ -12,11 +12,11 @@
 all: $SPELLDIR/nb.latin1.spl $SPELLDIR/nb.utf-8.spl ../README_nb.txt
 
 $SPELLDIR/nb.latin1.spl : $FILES
-        :sys env LANG=no_NO.ISO8859-1
+        :sys env LANG=nb_NO.ISO-8859-1
 		$VIM -u NONE -e -c "mkspell! $SPELLDIR/nb nb_NO" -c q
 
 $SPELLDIR/nb.utf-8.spl : $FILES
-        :sys env LANG=no_NO.UTF-8
+        :sys env LANG=nb_NO.UTF-8
 		$VIM -u NONE -e -c "mkspell! $SPELLDIR/nb nb_NO" -c q
 
 ../README_nb.txt : README_nb_NO.txt