diff --git a/include/trng.h b/include/trng.h
new file mode 100644
index 0000000000..fe1c96825e
--- /dev/null
+++ b/include/trng.h
@@ -0,0 +1,22 @@
+/* Copyright 2015 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef __EC_INCLUDE_TRNG_H
+#define __EC_INCLUDE_TRNG_H
+
+/**
+ * Initialize the true random number generator.
+ *
+ * Not supported by all platforms.
+ **/
+void init_trng(void);
+
+/**
+ * Retrieve a 32 bit random value.
+ *
+ * Not supported on all platforms.
+ **/
+uint32_t rand(void);
+
+#endif /* __EC_INCLUDE_TRNG_H */