diff --git a/readme.md b/readme.md
index 067c419..caac057 100644
--- a/readme.md
+++ b/readme.md
@@ -15,7 +15,8 @@
 A HOP addr ; skip next instruction if A == addr ... when true: IP <- PC + 2
 B JMP lit# ; ... IP <- lit#
 C JMP addr ; ... IP <- addr
-D CAT ---- ; Carry Flag Toggle ... CF <- !CF
+~~D CAT ---- ; Carry Flag Toggle ... CF <- !CF~~
+D CCF ———— ; Clear Carry Flag ... CF = 0
 E CHP ---- ; skip next instruction if Carry Flag is set ... when true: IP <- PC + 2
 F