diff --git a/l10n/ja/viewer.properties b/l10n/ja/viewer.properties
index f31db2d2b..0dcf96a08 100644
--- a/l10n/ja/viewer.properties
+++ b/l10n/ja/viewer.properties
@@ -96,6 +96,7 @@ page_scale_actual=実際のサイズ
 # Loading indicator messages
 loading_error_indicator=エラー
 loading_error=PDFの読み込み中にエラーが発生しました
+invalid_file_error=無効または破損したPDFファイル
 
 # LOCALIZATION NOTE (text_annotation_type): This is used as a tooltip.
 # "{{type}}" will be replaced with an annotation type from a list defined in