diff --git a/man7/cgroups.7 b/man7/cgroups.7
index 4dc4c9731..557354b16 100644
--- a/man7/cgroups.7
+++ b/man7/cgroups.7
@@ -99,6 +99,8 @@ Thus, for example, it is possible to use those controllers
 that are supported under version 2,
 while also using version 1 controllers
 where version 2 does not yet support those controllers.
+The only restriction here is that a controller can't be simultaneously
+employed in both a cgroups v1 hierarchy and in the cgroups v2 hierarchy.
 .\"
 .SS Cgroups version 1
 Under cgroups v1, each controller may be mounted against a separate