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diff --git a/lib/erl_interface/src/legacy/erl_eterm.h b/lib/erl_interface/src/legacy/erl_eterm.h
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+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 1996-2009. 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%
+ */
+#ifndef _ERL_ETERM_H
+#define _ERL_ETERM_H
+
+#ifndef SILENT
+#include <stdio.h>
+#endif
+
+#include "portability.h"
+
+#define ERL_MAX_COUNT 0xffffff
+#define ERL_MAX ((1 << 27)-1)
+#define ERL_MIN -(1 << 27)
+
+/* FIXME should this be documented and in erl_interface.h ??? */
+#define ERL_BIG_ARITY(x) ((x)->uval.bigval.arity)
+#define ERL_BIG_IS_NEG(x) ((x)->uval.bigval.is_neg)
+#define ERL_BIG_DIGITS(x) ((x)->uval.bigval.digits)
+#define ERL_BIG_DIGIT(x,i) (ERL_BIG_DIGITS(x)[(i)])
+
+/*
+ * Typing checking macros.
+ */
+
+/* FIXME should this be documented and in erl_interface.h ??? */
+#define ERL_IS_DEFINED(x) (ERL_TYPE(x) != 0)
+#define ERL_IS_COMPOUND(x) (ERL_TYPE(x) & ERL_COMPOUND)
+#define ERL_IS_FUNCTION(x) (ERL_TYPE(x) == ERL_FUNCTION)
+#define ERL_IS_BIG(x) (ERL_TYPE(x) == ERL_BIG)
+
+
+typedef struct _heapmark {
+ unsigned long mark; /* id */
+ int size; /* size of buffer */
+ Erl_Heap *base; /* points to start of buffer */
+ Erl_Heap *cur; /* points into buffer */
+ struct _heapmark *prev; /* previous heapmark */
+} Erl_HeapMark;
+
+
+ETERM * __erl_mk_reference(const char *, size_t, unsigned int n[], unsigned char);
+int erl_current_fix_desc(void);
+
+#endif /* _ERL_ETERM_H */