diff --git a/m1/case/README b/m1/case/README
index 6b2decd..be35c3c 100644
--- a/m1/case/README
+++ b/m1/case/README
@@ -20,3 +20,5 @@ Known issues:
 - button holes are a bit too tight
 
 - DC connector hole is too tight on all sides
+
+- the IR receiver is blocked