diff --git a/README.md b/README.md
index 23d051c..6bdaff1 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,7 @@ Basic Goals and Status:
     - [x] Modes
       - [x] FM
       - [x] FM stereo
+        - [ ] Experimental, needs improvement
       - [x] AM
       - [x] LSB
       - [x] USB