Index: kernel/generic/src/ipc/sysipc.c
===================================================================
--- kernel/generic/src/ipc/sysipc.c	(revision e49b57b294e490e709e48b481e92dc50cbbf8a3d)
+++ kernel/generic/src/ipc/sysipc.c	(revision 057d21af95b6d9e801a14c4a6e6e4a784ad3dfd7)
@@ -44,4 +44,5 @@
 #include <ipc/ipcrsc.h>
 #include <ipc/kbox.h>
+#include <synch/waitq.h>
 #include <udebug/udebug_ipc.h>
 #include <arch/interrupt.h>
@@ -1051,4 +1052,11 @@
 }
 
+/** Interrupt one thread from sys_ipc_wait_for_call(). */
+unative_t sys_ipc_poke(void)
+{
+	waitq_unsleep(&TASK->answerbox.wq);	
+	return EOK;
+}
+
 /** Connect an IRQ handler to a task.
  *