diff --git a/readchar/key.py b/readchar/key.py
index 865427f..c5ed6df 100644
--- a/readchar/key.py
+++ b/readchar/key.py
@@ -6,6 +6,8 @@
 SUPR = ""
 SPACE = "\x20"
 ESC = "\x1b"
+TAB = "\x09"
+SHIFT_TAB = "\x1b\x5b\x5a"
 
 # CTRL
 CTRL_A = "\x01"