diff --git a/ch04_keys.adoc b/ch04_keys.adoc
index 8a217f82..43098ad0 100644
--- a/ch04_keys.adoc
+++ b/ch04_keys.adoc
@@ -553,6 +553,7 @@ to public keys by first hashing the key with SHA256 and then hashing
 that output with RIPEMD-160; this produced a 20-byte commitment to the
 public key.
 
+[role="less_space pagebreak-before"]
 We can look at that algorithmically.
 Starting with the public key _K_, we compute the SHA256 hash and then
 compute the RIPEMD-160 hash of the result, producing a 160-bit (20-byte)