diff --git a/docs/user/app/Invoker.dox b/docs/user/app/Invoker.dox
index 7578dc53c6..8c85fd18c9 100644
--- a/docs/user/app/Invoker.dox
+++ b/docs/user/app/Invoker.dox
@@ -105,7 +105,7 @@
 
 	When Invoke() is called with a \c NULL message parameter, a copy of the
 	passed in \a message is sent to the target BHandler. BInvoker takes
-	ownership of the BMessage object, so you should not delete it yourself.
+	ownership of the BMessage object, so you must not delete it yourself.
 
 	\since BeOS R3
 */