diff --git a/envoy/data/accesslog/v3/accesslog.proto b/envoy/data/accesslog/v3/accesslog.proto
index 25e7a80b..a247c08d 100644
--- a/envoy/data/accesslog/v3/accesslog.proto
+++ b/envoy/data/accesslog/v3/accesslog.proto
@@ -409,6 +409,9 @@ message TLSProperties {
 
     // The subject field of the certificate.
     string subject = 2;
+
+    // The issuer field of the certificate.
+    string issuer = 3;
   }
 
   // Version of TLS that was negotiated.