diff --git a/board/sandbox/README.sandbox b/board/sandbox/README.sandbox
index 5e8fa58b..c10dd44 100644
--- a/board/sandbox/README.sandbox
+++ b/board/sandbox/README.sandbox
@@ -442,6 +442,20 @@
 environment variable to the correct pathname before building U-Boot.
 
 
+Using valgrind / memcheck
+-------------------------
+
+It is possible to run U-Boot under valgrind to check memory allocations:
+
+   valgrind u-boot
+
+If you are running sandbox SPL or TPL, then valgrind will not by default
+notice when U-Boot jumps from TPL to SPL, or from SPL to U-Boot proper. To
+fix this, use:
+
+   valgrind --trace-children=yes u-boot
+
+
 Testing
 -------