diff --git a/mozilla/mail/base/content/icon64.png b/mozilla/mail/base/content/icon64.png
new file mode 100644
index 00000000000..34a8eec2667
Binary files /dev/null and b/mozilla/mail/base/content/icon64.png differ
diff --git a/mozilla/mail/base/jar.mn b/mozilla/mail/base/jar.mn
index bd4719ecec0..5a904754b9c 100644
--- a/mozilla/mail/base/jar.mn
+++ b/mozilla/mail/base/jar.mn
@@ -45,6 +45,8 @@ messenger.jar:
     content/branding/about-thunderbird.png          (content/about-thunderbird.png)
     content/branding/thunderbird-watermark.png      (content/thunderbird-watermark.png)
 #endif
+# The following file should have an official-branding version also. See bug 286483
+    content/branding/icon64.png                     (content/icon64.png)
 *   content/messenger-region/contents.rdf           (/mailnews/base/resources/content/contents-region.rdf)
     content/messenger/msgSynchronize.xul            (/mailnews/base/resources/content/msgSynchronize.xul)
     content/messenger/msgSynchronize.js             (/mailnews/base/resources/content/msgSynchronize.js)