diff --git a/ReadMe.c b/ReadMe.c
index c2415c26..cf35dbf8 100644
--- a/ReadMe.c
+++ b/ReadMe.c
@@ -226,6 +226,8 @@ char Help[] =
 "            Create a new array from unused devices.\n"
 "       mdadm --assemble device options...\n"
 "            Assemble a previously created array.\n"
+"       mdadm --detail device options...\n"
+"            Show detailed status of an array..\n"
 "       mdadm --build device options...\n"
 "            Create or assemble an array without metadata.\n"
 "       mdadm --manage device options...\n"