diff --git a/include/polarssl/entropy_poll.h b/include/polarssl/entropy_poll.h
new file mode 100644
index 0000000..d9acbe5
--- /dev/null
+++ b/include/polarssl/entropy_poll.h
@@ -0,0 +1,68 @@
+/**
+ * \file entropy_poll.h
+ *
+ * \brief Platform-specific and custom entropy polling functions
+ *
+ *  Copyright (C) 2006-2011, Brainspark B.V.
+ *
+ *  This file is part of PolarSSL (http://www.polarssl.org)
+ *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_ENTROPY_POLL_H
+#define POLARSSL_ENTROPY_POLL_H
+
+#include <string.h>
+
+#include "config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(POLARSSL_NO_PLATFORM_ENTROPY)
+/**
+ * \brief           Platform-specific entropy poll callback
+ */
+int platform_entropy_poll( void *data,
+                           unsigned char *output, size_t len, size_t *olen );
+#endif
+
+#if defined(POLARSSL_HAVEGE_C)
+/**
+ * \brief           HAVEGE based entropy poll callback
+ *
+ * Requires an HAVEGE state as its data pointer.
+ */
+int havege_poll( void *data,
+                 unsigned char *output, size_t len, size_t *olen );
+#endif
+
+#if defined(POLARSSL_TIMING_C)
+/**
+ * \brief           hardclock-based entropy poll callback
+ */
+int hardclock_poll( void *data,
+                    unsigned char *output, size_t len, size_t *olen );
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* entropy_poll.h */