diff --git a/stable/presentation-time/presentation-time.xml b/stable/presentation-time/presentation-time.xml
index 00fea53..04301ff 100644
--- a/stable/presentation-time/presentation-time.xml
+++ b/stable/presentation-time/presentation-time.xml
@@ -198,7 +198,7 @@
       </entry>
     </enum>
 
-    <event name="presented">
+    <event name="presented" type="destructor">
       <description summary="the content update was displayed">
         The associated content update was displayed to the user at the
         indicated time (tv_sec_hi/lo, tv_nsec). For the interpretation of
@@ -256,7 +256,7 @@
       <arg name="flags" type="uint" enum="kind" summary="combination of 'kind' values"/>
     </event>
 
-    <event name="discarded">
+    <event name="discarded" type="destructor">
       <description summary="the content update was not displayed">
         The content update was never displayed to the user.
       </description>