diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22ef722..4b8439c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@
 ## Other
 * none
 ## Known bugs
-* none so far
+* USB in KISS mode has problem with TX frames
 # 1.2.1 (2021-10-13)
 ## New features
 * none