diff --git a/reference/ibase/functions/ibase-set-event-handler.xml b/reference/ibase/functions/ibase-set-event-handler.xml
index a146a04307..cc533a4186 100644
--- a/reference/ibase/functions/ibase-set-event-handler.xml
+++ b/reference/ibase/functions/ibase-set-event-handler.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
   <refentry id="function.ibase-set-event-handler">
    <refnamediv>
     <refname>ibase_set_event_handler</refname>
@@ -21,7 +21,7 @@
      This function registers a PHP user function as event handler for the specified
      events. The callback is called with the event name and the link resource as arguments
      whenever one of the specified events is posted by the database. The callback must
-     return false if the event handler should be canceled. Any other return value is ignored.
+     return &false; if the event handler should be canceled. Any other return value is ignored.
 	</para>
 	<para>
      <informalexample>