diff --git a/lib/elibri_onix_generator.rb b/lib/elibri_onix_generator.rb
index f7d6084..1e9c3a0 100644
--- a/lib/elibri_onix_generator.rb
+++ b/lib/elibri_onix_generator.rb
@@ -724,7 +724,7 @@ def export_contributors!(product)
                 comment_dictionary 'Rola autora', :ContributorRole, :indent => 10, :kind => :onix_contributors
                 tag(:ContributorRole, contributor.role_onix_code) #lista 17
                 comment 'Tylko w przypadku tłumaczy:', :kind => :onix_contributors
-                tag(:FromLanguage, contributor.language_onix_code) if contributor.language_onix_code
+                tag(:FromLanguage, contributor.language_onix_code) if contributor.language_onix_code.present?
                 tag(:PersonName, contributor.generated_full_name) #zawsze jest TODO - dodać takie pole do bazy danych
 
                 tag(:TitlesBeforeNames, contributor.title) if contributor.title.present? #tytuł