diff --git a/ch03_bitcoin-core.adoc b/ch03_bitcoin-core.adoc
index bab1a292..ed81f684 100644
--- a/ch03_bitcoin-core.adoc
+++ b/ch03_bitcoin-core.adoc
@@ -10,7 +10,7 @@ was designed so that it's possible for software running entirely on your
 local computer to perfectly prevent counterfeiting, debasement, and
 several other critical problems.  Software which provides that function
 is called a _full verification node_ because it verifies every confirmed
-Bitcoin transaction against every rule in the system.  Full verification
+Bitcoin transaction against every rule in the system.  Full ((("full nodes")))verification
 nodes, _full nodes_ for short, may also provide tools and data for
 understanding how Bitcoin works and what is currently happening in the
 network.