diff --git a/mozilla/calendar/resources/content/alertDialog.xul b/mozilla/calendar/resources/content/alertDialog.xul
index 96d9bcd5d99..50169ac1fad 100644
--- a/mozilla/calendar/resources/content/alertDialog.xul
+++ b/mozilla/calendar/resources/content/alertDialog.xul
@@ -50,12 +50,13 @@
[
%dtd1;
%dtd2;
+ %dtd3;
]>
@@ -117,4 +118,4 @@
-
\ No newline at end of file
+
diff --git a/mozilla/calendar/resources/content/calendarEventAlertDialog.xul b/mozilla/calendar/resources/content/calendarEventAlertDialog.xul
index 96d9bcd5d99..50169ac1fad 100644
--- a/mozilla/calendar/resources/content/calendarEventAlertDialog.xul
+++ b/mozilla/calendar/resources/content/calendarEventAlertDialog.xul
@@ -50,12 +50,13 @@
[
%dtd1;
%dtd2;
+ %dtd3;
]>
@@ -117,4 +118,4 @@
-
\ No newline at end of file
+