diff --git a/src/shrpx.cc b/src/shrpx.cc
index 684d7b3e..eada0491 100644
--- a/src/shrpx.cc
+++ b/src/shrpx.cc
@@ -3196,7 +3196,7 @@ Scripting:
 
 #ifdef ENABLE_HTTP3
   out << R"(
-QUIC:
+HTTP/3 and QUIC:
   --frontend-quic-idle-timeout=<DURATION>
               Specify an idle timeout for QUIC connection.
               Default: )"