diff --git a/content/docs/fossvr/wivrn/_index.md b/content/docs/fossvr/wivrn/_index.md
index 65eeef8..27c3baf 100644
--- a/content/docs/fossvr/wivrn/_index.md
+++ b/content/docs/fossvr/wivrn/_index.md
@@ -143,6 +143,8 @@ This section covers using WiVRn 0.19 and newer with any Lighthouse-tracked devic
 
 You must have SteamVR installed (no need to run it).
 
+Upstream xrizer doesn't support FBT, so either **select OpenComposite as the OpenVR library** in WiVRn dashboard settings, or build the [experimental2 branch of xrizer](https://github.com/RinLovesYou/xrizer/tree/experimental2).
+
 ### Using Distro-Native Packages
 
 These packages come with lighthouse support enabled (Flatpak & Envision does NOT)