diff --git a/ch08_signatures.adoc b/ch08_signatures.adoc
index 8b8eaa85..678153db 100644
--- a/ch08_signatures.adoc
+++ b/ch08_signatures.adoc
@@ -606,7 +606,7 @@ that are believed to be secure.
 Alice and Bob need to derive the public key for _x_, which is _xG_.
 Since it's possible to use elliptic curve operations to add two EC
 points together, they start by Alice deriving _yG_ and Bob deriving
-_zG_.  They then add them together to create _xG_ = _yG_ + _zG_.  The point
+_zG_.  They then add them together to create [.keep-together]#_xG_ = _yG_ + _zG_.#  The point
 _xG_ is ((("aggregated public keys")))((("public keys", "aggregated")))their _aggregated public key_.  To create a signature, they begin the
 simple multisignature protocol: