diff --git a/gio/gsettings.c b/gio/gsettings.c
index 7f3216766..9096e8302 100644
--- a/gio/gsettings.c
+++ b/gio/gsettings.c
@@ -134,7 +134,8 @@
  * <!ELEMENT aliases (alias+) >
  * <!-- each alias element specifies an alias for one of the possible values -->
  * <!ELEMENT alias EMPTY >
- * <!ATTLIST alias value CDATA #REQUIRED >
+ * <!ATTLIST alias value CDATA #REQUIRED
+ *                 target CDATA #REQUIRED >
  *
  * <!ELEMENT child EMPTY >
  * <!ATTLIST child name  CDATA #REQUIRED