diff --git a/src/node_crypto.cc b/src/node_crypto.cc
index 7f78a42704..68613ab565 100644
--- a/src/node_crypto.cc
+++ b/src/node_crypto.cc
@@ -1202,6 +1202,8 @@ void SecureContext::SetFreeListLength(const FunctionCallbackInfo<Value>& args) {
 }
 
 
+// Currently, EnableTicketKeyCallback and TicketKeyCallback are only present for
+// the regression test in test/parallel/test-https-resume-after-renew.js.
 void SecureContext::EnableTicketKeyCallback(
     const FunctionCallbackInfo<Value>& args) {
   SecureContext* wrap;