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diff --git a/erts/include/internal/i386/ethread.h b/erts/include/internal/i386/ethread.h
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+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2005-2009. 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
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+/*
+ * Low-level ethread support on x86/x86-64.
+ * Author: Mikael Pettersson.
+ */
+#ifndef ETHREAD_I386_ETHREAD_H
+#define ETHREAD_I386_ETHREAD_H
+
+#include "atomic.h"
+#include "spinlock.h"
+#include "rwlock.h"
+
+#define ETHR_HAVE_NATIVE_ATOMICS 1
+#define ETHR_HAVE_NATIVE_LOCKS 1
+
+#endif /* ETHREAD_I386_ETHREAD_H */