diff --git a/ch03_bitcoin-core.adoc b/ch03_bitcoin-core.adoc
index c835fe6f..6f56a9a2 100644
--- a/ch03_bitcoin-core.adoc
+++ b/ch03_bitcoin-core.adoc
@@ -88,7 +88,7 @@ https://oreil.ly/BdOwl[GitHub bitcoin page].
 [TIP]
 ====
 In
-many of the examples in this chapter we will be using the operating
+many of the ((("command prompts")))((("shell command prompts")))examples in this chapter we will be using the operating
 system's command-line interface (also known as a "shell"), accessed via
 a "terminal" application. The shell will display a prompt, you type a
 command, and the shell responds with some text and a new prompt for your