diff --git a/l10n/en-US/viewer.properties b/l10n/en-US/viewer.properties
index 8e0ca9879..35391eabd 100644
--- a/l10n/en-US/viewer.properties
+++ b/l10n/en-US/viewer.properties
@@ -61,6 +61,7 @@ find_highlight=Highlight all
 find_match_case_label=Match case
 find_wrapped_to_bottom=Reached end of page, continued from bottom
 find_wrapped_to_top=Reached end of page, continued from top
+find_not_found=Phrase not found
 
 # Error panel labels
 error_more_info=More Information