diff --git a/calendar/gui/alarm-notify/notify-main.c b/calendar/gui/alarm-notify/notify-main.c
index dc095f5d2e..966571350d 100644
--- a/calendar/gui/alarm-notify/notify-main.c
+++ b/calendar/gui/alarm-notify/notify-main.c
@@ -31,6 +31,7 @@
 #include <gtk/gtk.h>
 #include <glib/gi18n.h>
 #include <unique/unique.h>
+#include <dbus/dbus-glib.h>
 #include <camel/camel-object.h>
 #include <libedataserver/e-source.h>
 #include <libedataserverui/e-passwords.h>