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-rw-r--r--erts/emulator/beam/erl_port_task.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/erts/emulator/beam/erl_port_task.h b/erts/emulator/beam/erl_port_task.h
index 714b4ea7dd..3e2c5f07ab 100644
--- a/erts/emulator/beam/erl_port_task.h
+++ b/erts/emulator/beam/erl_port_task.h
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2006-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2006-2011. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
@@ -102,6 +102,7 @@ erts_port_task_init_sched(ErtsPortTaskSched *ptsp)
ERTS_GLB_INLINE int
erts_port_task_have_outstanding_io_tasks(void)
{
+ ERTS_THR_MEMORY_BARRIER;
return erts_smp_atomic_read(&erts_port_task_outstanding_io_tasks) != 0;
}