diff --git a/README.md b/README.md
index 5e1a41d6..54bddd77 100644
--- a/README.md
+++ b/README.md
@@ -142,6 +142,8 @@ See detailed steps to install on Windows Kubernetes [here](./kubernetes/kubernet
 
 `windows_exporter` supports Windows Server versions 2016 and later, and desktop Windows version 10 and 11 (21H2 or later).
 
+Windows Server 2012 and 2012R2 are supported as best-effort only, but not guaranteed to work.
+
 ## Usage
 
     go get -u github.com/prometheus/promu