diff --git a/README.md b/README.md
index 6989b01..4349b19 100644
--- a/README.md
+++ b/README.md
@@ -16,4 +16,7 @@
 ## Build  
 ```shell
 make
-```
\ No newline at end of file
+```
+
+## Warning  
+delays in TTY may be broken
\ No newline at end of file