diff --git a/10_onion_routing.asciidoc b/10_onion_routing.asciidoc
index a029030..36cc962 100644
--- a/10_onion_routing.asciidoc
+++ b/10_onion_routing.asciidoc
@@ -3,7 +3,7 @@
 
 In this chapter we will describe the Lightning Network's onion routing_ mechanism. The invention of _onion routing_ precedes the Lightning Network by 25 years! Onion routing was invented by U.S. Navy researchers as a communications security protocol. Onion routing is most famously used by Tor, the onion routed internet overlay that allows researchers, activists, intelligence agents, and everyone else to use the internet privately and anonymously.
 
-In this chapter we are focusing on the "Source-Based Onion Routing (SPHINX)" part of the Lightning protocol architecture, highlighted by a double outline in the center (Routing Layer) of <<LN_protocol_onion_highlight>>. 
+In this chapter we are focusing on the "Source-based onion routing (SPHINX)" part of the Lightning protocol architecture, highlighted by a double outline in the center (routing layer) of <<LN_protocol_onion_highlight>>. 
 
 [[LN_protocol_onion_highlight]]
 .The Lightning Network protocol suite