diff --git a/content/base/src/nsContentSink.cpp b/content/base/src/nsContentSink.cpp
index ecec06f2466..cc7b9cc62f9 100644
--- a/content/base/src/nsContentSink.cpp
+++ b/content/base/src/nsContentSink.cpp
@@ -1916,9 +1916,7 @@ nsIAtom** const kDefaultAllowedAttributes [] = {
   &nsGkAtoms::media,
   &nsGkAtoms::method,
   &nsGkAtoms::min,
-#ifdef MOZ_MAIL_NEWS
   &nsGkAtoms::mozdonotsend,
-#endif
   &nsGkAtoms::multiple,
   &nsGkAtoms::name,
   &nsGkAtoms::nohref,
diff --git a/content/base/src/nsGkAtomList.h b/content/base/src/nsGkAtomList.h
index a504e3d78f2..9a03262a093 100644
--- a/content/base/src/nsGkAtomList.h
+++ b/content/base/src/nsGkAtomList.h
@@ -65,9 +65,7 @@ GK_ATOM(_empty, "")
 GK_ATOM(moz, "_moz")
 GK_ATOM(moztype, "_moz-type")
 GK_ATOM(mozdirty, "_moz_dirty")
-#ifdef MOZ_MAIL_NEWS
-GK_ATOM(mozdonotsend, "_moz_do_not_send")
-#endif
+GK_ATOM(mozdonotsend, "moz-do-not-send")
 GK_ATOM(mozeditorbogusnode, "_moz_editor_bogus_node")
 GK_ATOM(mozgeneratedcontentbefore, "_moz_generated_content_before")
 GK_ATOM(mozgeneratedcontentafter, "_moz_generated_content_after")