diff --git a/src/shrpx_config.cc b/src/shrpx_config.cc
index 8e3dec1c..73bdf71a 100644
--- a/src/shrpx_config.cc
+++ b/src/shrpx_config.cc
@@ -2065,7 +2065,7 @@ int parse_config(const char *opt, const char *optarg,
       return -1;
     }
 
-    AltSvc altsvc;
+    AltSvc altsvc{};
 
     altsvc.protocol_id = std::move(tokens[0]);
 
diff --git a/src/shrpx_config.h b/src/shrpx_config.h
index f849fc39..ea442556 100644
--- a/src/shrpx_config.h
+++ b/src/shrpx_config.h
@@ -256,8 +256,6 @@ enum shrpx_forwarded_node_type {
 };
 
 struct AltSvc {
-  AltSvc() : port(0) {}
-
   std::string protocol_id, host, origin, service;
 
   uint16_t port;