diff --git a/ch12.asciidoc b/ch12.asciidoc
index d973eaf8..84d99334 100644
--- a/ch12.asciidoc
+++ b/ch12.asciidoc
@@ -426,7 +426,7 @@ IF
 ELSE
     # Refund after timeout.
     <locktime> CHECKLOCKTIMEVERIFY DROP
-    <Payee Pubic Key> CHECKSIG
+    <Payee Public Key> CHECKSIG
 ENDIF
 ----