diff --git a/l10n/en-US/viewer.properties b/l10n/en-US/viewer.properties
index f64be7bf2..fb865aa50 100644
--- a/l10n/en-US/viewer.properties
+++ b/l10n/en-US/viewer.properties
@@ -240,6 +240,8 @@ editor_free_text2.title=Text
 editor_free_text2_label=Text
 editor_ink2.title=Draw
 editor_ink2_label=Draw
+editor_stamp.title=Add an image
+editor_stamp_label=Add an image
 
 free_text2_default_content=Start typing…