diff --git a/data/org.gnome.shell.gschema.xml.in b/data/org.gnome.shell.gschema.xml.in
index 00bba5d05..3772d46e8 100644
--- a/data/org.gnome.shell.gschema.xml.in
+++ b/data/org.gnome.shell.gschema.xml.in
@@ -53,11 +53,13 @@
     </key>
     <key name="saved-im-presence" type="i">
       <default>1</default>
-      <_summary></_summary>
+      <_summary>Internally used to store the last IM presence explicitly set by the user. The
+value here is from the TpConnectionPresenceType enumeration.</_summary>
     </key>
     <key name="saved-session-presence" type="i">
       <default>0</default>
-      <_summary></_summary>
+      <_summary>Internally used to store the last session presence status for the user. The
+value here is from the GsmPresenceStatus enumeration.</_summary>
     </key>
     <child name="clock" schema="org.gnome.shell.clock"/>
     <child name="calendar" schema="org.gnome.shell.calendar"/>