diff --git a/src/main/resources/messages_en_GB.properties b/src/main/resources/messages_en_GB.properties
index 7012873e..b8c634f2 100644
--- a/src/main/resources/messages_en_GB.properties
+++ b/src/main/resources/messages_en_GB.properties
@@ -150,6 +150,7 @@ pageLayout.submit=Submit
 scalePages.title=Adjust page-scale
 scalePages.header=Adjust page-scale
 scalePages.pageSize=Size of a page of the document.
+scalePages.scaleFactor=Zoom level (crop) of a page.
 scalePages.submit=Submit
 
 certSign.title=Certificate Signing