diff --git a/realloc.h b/realloc.h
new file mode 100644
index 0000000000000000000000000000000000000000..5e66130fb32fe041905201332f852fcd609fbda6
--- /dev/null
+++ b/realloc.h
@@ -0,0 +1,35 @@
+/* realloc.h
+ *
+ */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2002 Niels Möller
+ *  
+ * The nettle library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ * 
+ * The nettle library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+ * License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the nettle library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+ 
+#ifndef NETTLE_REALLOC_H_INCLUDED
+#define NETTLE_REALLOC_H_INCLUDED
+
+#include <inttypes.h>
+
+typedef void *nettle_realloc_func(void *ctx, void *p, unsigned length);
+
+nettle_realloc_func nettle_realloc;
+nettle_realloc_func nettle_xrealloc;
+
+#endif /* NETTLE_REALLOC_H_INCLUDED */