diff --git a/ch05.asciidoc b/ch05.asciidoc
index 6cfb3042..679a413c 100644
--- a/ch05.asciidoc
+++ b/ch05.asciidoc
@@ -328,7 +328,7 @@ image::images/msbt_0502.png["TxScriptSimpleMathExample"]
 
 [TIP]
 ====
-Transactions are valid if the top result on the stack is TRUE (noted as ++{0x01}++), any other non-zero value or if the stack is empty after script execution. Transactions are invalid if the top value on the stack is FALSE (a zero-length empty value, noted as ++{}++) or if script execution is halted explicitly by an operator, such as OP_VERIFY, OP_RETURN, or a conditional terminator such as OP_ENDIF. See <<tx_script_ops>> for details.
+Transactions are valid if the top result on the stack is TRUE (noted as ++&#x7b;0x01&#x7d;++), any other non-zero value or if the stack is empty after script execution. Transactions are invalid if the top value on the stack is FALSE (a zero-length empty value, noted as ++&#x7b;&#x7d;++) or if script execution is halted explicitly by an operator, such as OP_VERIFY, OP_RETURN, or a conditional terminator such as OP_ENDIF. See <<tx_script_ops>> for details.
 ====