diff --git a/UI/WebServerResources/UIxMailEditor.css b/UI/WebServerResources/UIxMailEditor.css
index 66d4afa45..e3c227b8d 100644
--- a/UI/WebServerResources/UIxMailEditor.css
+++ b/UI/WebServerResources/UIxMailEditor.css
@@ -40,7 +40,7 @@ SPAN.headerInput INPUT
 
 DIV#subjectRow INPUT
 { background-image: none;
-  width: 38em;
+  width: 100%;
   padding-left: .5em; }
 
 div#compose_internetmarker