diff --git a/mail/base/content/mailWindowOverlay.xul b/mail/base/content/mailWindowOverlay.xul
index 0fc24800a21..e48cce97473 100644
--- a/mail/base/content/mailWindowOverlay.xul
+++ b/mail/base/content/mailWindowOverlay.xul
@@ -1419,7 +1419,6 @@
                accesskey="&headersAllCmd.accesskey;"
                oncommand="MsgViewAllHeaders();"/>
               <menuitem id="viewnormalheaders"
-               checked="true"
                type="radio"
                name="viewheadergroup"
                label="&headersNormalCmd.label;"
diff --git a/mailnews/base/resources/content/mailWindowOverlay.xul b/mailnews/base/resources/content/mailWindowOverlay.xul
index ad6f2b67e53..e8576ed381b 100644
--- a/mailnews/base/resources/content/mailWindowOverlay.xul
+++ b/mailnews/base/resources/content/mailWindowOverlay.xul
@@ -1286,7 +1286,6 @@
            accesskey="&headersAllCmd.accesskey;"
            oncommand="MsgViewAllHeaders();"/>
           <menuitem id="viewnormalheaders"
-           checked="true"
            type="radio"
            name="viewheadergroup"
            label="&headersNormalCmd.label;"