diff --git a/Kernel_Feature_Matrix.md b/Kernel_Feature_Matrix.md
index 8a37055..8a6027c 100644
--- a/Kernel_Feature_Matrix.md
+++ b/Kernel_Feature_Matrix.md
@@ -21,7 +21,7 @@
 | 4.17           | <ul><li> v8 abi<sup>1</sup></li><li>generic socket mediation (ie. basic network mediation)<sup>1</sup></li><li>improved profile attachment logic<ul><li>handle overlapping expression resolution up to 8 characters dynamic overlap in kernel<sup>2</sup></li><li>xattr attachment conditional<sup>1</sup></li><li>no_new_privs improved attachment with subset test based on confinement at time no_new_privs was entered<sup>3</sup></ul></li><li> signal mediation of profile stacks<sup>4</sup></li><li>Bug fixes and code cleanups</li></ul>       | ```1``` AppArmor 3.0<br>```2``` Any userspace that supports attachment conditionasl 2.5+<br>```3``` no userspace requirements, reduces cases where nnp prevents a transition<br>```4```Same userspace as regular signal mediation AppArmor 2.9  |
 | 4.18           | <ul><li>add support for secids and using secctxes</li><li>the ability to get a task's secid</li><li>add support for audit rules filtering. AppArmor task label can be used in audit rule filters</li><li>Bug fixes and code cleanups</li></ul>        | No apparmor userspace requirements.  |
 | 4.19           | Bug fixes and code cleanups|   |
-| 4.20           | <ul><li>Secmark mediation for custom policy</li><li>Bug fixes and code cleanups</li></ul> |
+| 4.20           | <ul><li>Secmark mediation for custom policy<sup>1</sup></li><li>Bug fixes and code cleanups</li></ul> | ```1``` Custom patch not in upstream apparmor |
 | 5.0            | Bug fixes and code cleanups|    |
 | 5.1            | <ul><li>LSM stacking with generic blobs (sara/landlock). Does not include secids so insufficient to stack with selinux and smack.</li><li>Bug fixes and code cleanups</li></ul> | no userspace requirements. There is a new kernel parameter <i>lsm=</i> that is used in place of the old <i>security=</i> parameter  |
 | 5.2            | wip <ul><li>fine grained af_unix mediation<ul><li>unix rules<sup>1</sup></li><li>get peer sock label via so_peersec<sup>2</sup><li><li>dbus mediation<sup>3</sup></li></ul></li><li>no-new-privs rules</li></ul>   | ```1``` AppArmor 3.0<br>```2```No userspace support needed to read via getsockopt. Library support for ```aa_getpeercon``` add in AppArmor 2.7<br>```3``` requires AppArmor 3.0 and D-Bus 1.10.0</li></ul>