diff --git a/plugins/serendipity_event_entryproperties/serendipity_event_entryproperties.php b/plugins/serendipity_event_entryproperties/serendipity_event_entryproperties.php
index 00570024..ac9437fb 100644
--- a/plugins/serendipity_event_entryproperties/serendipity_event_entryproperties.php
+++ b/plugins/serendipity_event_entryproperties/serendipity_event_entryproperties.php
@@ -130,7 +130,7 @@ class serendipity_event_entryproperties extends serendipity_event
         serendipity_plugin_api::hook_event('backend_cache_entries', $this->title);
     }
 
-    function uninstall() {
+    function uninstall(&$propbag) {
         serendipity_plugin_api::hook_event('backend_cache_purge', $this->title);
     }