diff --git a/arch/sandbox/include/asm/spi.h b/arch/sandbox/include/asm/spi.h
index 9985e3c..98e1826 100644
--- a/arch/sandbox/include/asm/spi.h
+++ b/arch/sandbox/include/asm/spi.h
@@ -1,5 +1,5 @@
 /*
- * Simulate a SPI port and clients (see README.sandbox for details)
+ * Simulate a SPI port and clients (see doc/arch/sandbox.rst for details)
  *
  * Copyright (c) 2011-2013 The Chromium OS Authors.
  * See file CREDITS for list of people who contributed to this