diff --git a/ch05.asciidoc b/ch05.asciidoc
index 9d0156fd..34e0818d 100644
--- a/ch05.asciidoc
+++ b/ch05.asciidoc
@@ -570,7 +570,7 @@ P2SH addresses hide all of the complexity, so that the person making a payment d
 
 ===== Redeem script and isStandard validation
 
-((("pay-to-script-hash (P2SH)","isStandard validation")))((("pay-to-script-hash (P2SH)","redeem script for")))Prior to version 0.9.2 of the Bitcoin Core client, pay-to-script-hash was limited to the standard types of bitcoin transaction scripts, by the +isStandard()+ function. That means that the redeem script presented in the spending transaction could only be one of the standard types: P2PK, P2PKH, or Multi-Sig, excluding +OP_RETURN+ and P2SH itself.
+((("pay-to-script-hash (P2SH)","isStandard validation")))((("pay-to-script-hash (P2SH)","redeem script for")))Prior to version 0.9.2 of the Bitcoin Core client, pay-to-script-hash was limited to the standard types of bitcoin transaction scripts, by the +isStandard()+ function. That means that the redeem script presented in the spending transaction could only be one of the standard types: P2PK, P2PKH, or multi-sig nature, excluding +OP_RETURN+ and P2SH itself.
 
 As of version 0.9.2 of the Bitcoin Core client, P2SH transactions can contain any valid script, making the P2SH standard much more flexible and allowing for experimentation with many novel and complex types of transactions.