diff --git a/Documentation/cgroups/memcg_test.txt b/Documentation/cgroups/memcg_test.txt
index 4d32e0e..f7f68b2 100644
--- a/Documentation/cgroups/memcg_test.txt
+++ b/Documentation/cgroups/memcg_test.txt
@@ -337,7 +337,7 @@
 	race and lock dependency with other cgroup subsystems.
 
 	example)
-	# mount -t cgroup none /cgroup -t cpuset,memory,cpu,devices
+	# mount -t cgroup none /cgroup -o cpuset,memory,cpu,devices
 
 	and do task move, mkdir, rmdir etc...under this.
 
@@ -348,7 +348,7 @@
 
 	For example, test like following is good.
 	(Shell-A)
-	# mount -t cgroup none /cgroup -t memory
+	# mount -t cgroup none /cgroup -o memory
 	# mkdir /cgroup/test
 	# echo 40M > /cgroup/test/memory.limit_in_bytes
 	# echo 0 > /cgroup/test/tasks