diff --git a/ch03.asciidoc b/ch03.asciidoc
index b5ff55ac..2344ede2 100644
--- a/ch03.asciidoc
+++ b/ch03.asciidoc
@@ -1148,7 +1148,7 @@ $ sx addr < public_key
 
 ===== Deterministic keys with sx
 
-The keys generated above are so called type-1 non-deterministic keys. That means that each one is generated from a random number generator. The sx tools also support type-2 deterministic keys, where a "master" key is created and then extended to produce a chain or tree of subkeys. 
+The keys generated above are so called type-0 non-deterministic keys. That means that each one is generated from a random number generator. The sx tools also support type-2 deterministic keys, where a "master" key is created and then extended to produce a chain or tree of subkeys. 
 
 First, we generate a "seed" that will be used as the basis to derive a chain of keys, compatible with the Electrum wallet and other similar implementations. We use the +newseed+ command to produce a seed value: