diff --git a/ch08_signatures.adoc b/ch08_signatures.adoc
index 64e894cc..09e98188 100644
--- a/ch08_signatures.adoc
+++ b/ch08_signatures.adoc
@@ -246,7 +246,7 @@ spend whenever they want.
 
 There are some proposals to modify or
 expand the +SIGHASH+ system.  The most widely discussed proposal as of
-this writing is BIP118, which proposes to add two
+this writing is ((("BIP118 SIGHASH flags")))BIP118, which proposes to add two
 new sighash flags.  A signature using +SIGHASH_ANYPREVOUT+ would not
 commit to an input's outpoint field, allowing it to be used to spend any
 previous output for a particular witness program.  For example, if Alice