diff --git a/openid-4-verifiable-credential-issuance-1_0.md b/openid-4-verifiable-credential-issuance-1_0.md
index 399d71ac..5af3c42c 100644
--- a/openid-4-verifiable-credential-issuance-1_0.md
+++ b/openid-4-verifiable-credential-issuance-1_0.md
@@ -56,7 +56,9 @@ The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "S
 
 # Terminology
 
-This specification uses the terms "Access Token", "Authorization Endpoint", "Authorization Request", "Authorization Response", "Authorization Code Grant", "Authorization Server", "Client", "Client Authentication", "Client Identifier", "Grant Type", "Refresh Token", "Token Endpoint", "Token Request" and "Token Response" defined by OAuth 2.0 [@!RFC6749], the terms "End-User", "Entity", and "Request Object" as defined by OpenID Connect Core [@!OpenID.Core], the term "JSON Web Token (JWT)" defined by JSON Web Token (JWT) [@!RFC7519], the term "JOSE Header" and "Base64url Encoding" defined by JSON Web Signature (JWS) [@!RFC7515].
+This specification uses the terms "Access Token", "Authorization Endpoint", "Authorization Request", "Authorization Response", "Authorization Code Grant", "Authorization Server", "Client", "Client Authentication", "Client Identifier", "Grant Type", "Refresh Token", "Token Endpoint", "Token Request" and "Token Response" defined by OAuth 2.0 [@!RFC6749], the terms "End-User", "Entity", and "Request Object" as defined by OpenID Connect Core [@!OpenID.Core], the term "JSON Web Token (JWT)" defined by JSON Web Token (JWT) [@!RFC7519], the term "JOSE Header" defined by JSON Web Signature (JWS) [@!RFC7515].
+
+Base64url-encoded denotes the URL-safe base64 encoding without padding defined in Section 2 of [@!RFC7515].
 
 This specification also defines the following terms. In the case where a term has a definition that differs, the definition below is authoritative for this specification.