diff --git a/glib/gdate.c b/glib/gdate.c
index cb25f3c..a532f77 100644
--- a/glib/gdate.c
+++ b/glib/gdate.c
@@ -928,7 +928,7 @@ g_date_set_time_t (GDate *date,
  * Sets the value of a date from a #GTime value.
  * The time to date conversion is done using the user's current timezone.
  *
- * @Deprecated:2.10: Use g_date_set_time_t() instead.
+ * @Deprecated:2.10: GTime is not Y2038 clean, use g_date_set_time_t() instead.
  */
 void
 g_date_set_time (GDate *date,
