diff --git a/ch03.asciidoc b/ch03.asciidoc
index 0fc37f5e..4af50a96 100644
--- a/ch03.asciidoc
+++ b/ch03.asciidoc
@@ -690,7 +690,7 @@ If you're implementing a JSON-RPC call in your own program, you can use a generi
 
 However, there are libraries in most every programming language that "wrap" the Bitcoin Core API in a way that makes this a lot simpler. We will use the +python-bitcoinlib+ library to simplify API access. Remember, this requires you to have a running Bitcoin Core instance, which will be used to make JSON-RPC calls.
 
-The Python script in <<rpc_example>> makes a simple +getblockchaininfo+ call and prints the +blocks+ parameter from the data returned by Bitcoin Core.
+The Python script in <<rpc_example>> makes a simple +getblockchaininfo+ call and prints the +blocks+ parameter from the data returned by Bitcoin Core (full node required).
 
 [[rpc_example]]
 .Running getblockchaininfo via Bitcoin Core's JSON-RPC API