diff --git a/ch12_mining.adoc b/ch12_mining.adoc
index 95982432..3520148c 100644
--- a/ch12_mining.adoc
+++ b/ch12_mining.adoc
@@ -1980,7 +1980,7 @@ described next.
 [[bip9]]
 ==== BIP9 Signaling and Activation
 
-The ((("consensus rules", "soft forks", "BIP9 signaling/activation", id="consensus-soft-bip9")))((("forks", "soft forks", "BIP9 signaling/activation", id="fork-soft-bip9")))((("soft forks", "BIP9 signaling/activation", id="soft-fork-bip9")))((("signaling", "BIP9", id="signal-bip9")))((("activation (soft forks)", "BIP9", id="activation-bip9")))((("BIP9 signaling/activation", id="bip9-ch12")))mechanism used by BIP34, BIP66, and BIP65 was
+The ((("consensus rules", "soft forks", "BIP9 signaling/activation", tertiary-sortas="BIP009", id="consensus-soft-bip9")))((("forks", "soft forks", "BIP9 signaling/activation", tertiary-sortas="BIP009", id="fork-soft-bip9")))((("soft forks", "BIP9 signaling/activation", secondary-sortas="BIP009", id="soft-fork-bip9")))((("signaling", "BIP9", secondary-sortas="BIP009", id="signal-bip9")))((("activation (soft forks)", "BIP9", secondary-sortas="BIP009", id="activation-bip9")))((("BIP9 signaling/activation", primary-sortas="BIP009", id="bip9-ch12")))mechanism used by BIP34, BIP66, and BIP65 was
 successful in activating three soft forks. However, it was replaced
 because it had several limitations: