diff --git a/future-proofed-and-federation-ready-enterprise-ids.adoc b/future-proofed-and-federation-ready-enterprise-ids.adoc
index e18b2fd..1e5780b 100644
--- a/future-proofed-and-federation-ready-enterprise-ids.adoc
+++ b/future-proofed-and-federation-ready-enterprise-ids.adoc
@@ -17,7 +17,7 @@ The value consists of two substrings (termed a “unique ID” and a “scope”
 
 The scope consists of 1 to 127 ASCII characters, each of which is either an alphanumeric ASCII character, a hyphen (ASCII 45), or a period (ASCII 46). The first character MUST be alphanumeric. 
 
-Note that subject-id will be matched in a case-INsensitive way.
+Note that subject-ids must be matched in a case-INsensitive manner.
 
 The scope deliberately resembles, and often is, a DNS domain name, but is drawn from a more limited character set due to case folding considerations, and no attempt is made to limit the allowable grammar to legal domain names (e.g., it allows consecutive periods).