Index: uspace/lib/c/generic/async/server.c
===================================================================
--- uspace/lib/c/generic/async/server.c	(revision 2cea4c585d04ba6729a55fa46ff3c45fdd514a70)
+++ uspace/lib/c/generic/async/server.c	(revision 5c38838e92d8bcc5d2e86f5cef278082a4aed75b)
@@ -623,4 +623,5 @@
 		//        passing it out. Unfortunatelly, somehow that breaks
 		//        handling of CPU exceptions.
+		async_answer_0(call, EOK);
 	}