diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index 21f9c76..2f691fb 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -328,13 +328,16 @@
 	  module will be called cls_flow.
 
 config NET_CLS_CGROUP
-	bool "Control Group Classifier"
+	tristate "Control Group Classifier"
 	select NET_CLS
 	depends on CGROUPS
 	---help---
 	  Say Y here if you want to classify packets based on the control
 	  cgroup of their process.
 
+	  To compile this code as a module, choose M here: the
+	  module will be called cls_cgroup.
+
 config NET_EMATCH
 	bool "Extended Matches"
 	select NET_CLS