diff --git a/src/h2load.cc b/src/h2load.cc
index f60ffeaf..53db71c9 100644
--- a/src/h2load.cc
+++ b/src/h2load.cc
@@ -812,7 +812,7 @@ int main(int argc, char **argv)
   SSL_library_init();
 
 #ifndef NOTHREADS
-  ssl::LibsslGlobalLock();
+  ssl::LibsslGlobalLock lock;
 #endif // NOTHREADS
 
   auto ssl_ctx = SSL_CTX_new(SSLv23_client_method());
diff --git a/src/nghttpd.cc b/src/nghttpd.cc
index a75a23b9..d037615e 100644
--- a/src/nghttpd.cc
+++ b/src/nghttpd.cc
@@ -296,7 +296,7 @@ int main(int argc, char **argv)
   SSL_load_error_strings();
   SSL_library_init();
 #ifndef NOTHREADS
-  ssl::LibsslGlobalLock();
+  ssl::LibsslGlobalLock lock;
 #endif // NOTHREADS
 
   reset_timer();
diff --git a/src/shrpx.cc b/src/shrpx.cc
index 1bb3ea51..65277894 100644
--- a/src/shrpx.cc
+++ b/src/shrpx.cc
@@ -1621,7 +1621,7 @@ int main(int argc, char **argv)
   SSL_load_error_strings();
   SSL_library_init();
 #ifndef NOTHREADS
-  nghttp2::ssl::LibsslGlobalLock();
+  nghttp2::ssl::LibsslGlobalLock lock;
 #endif // NOTHREADS
 
   if(conf_exists(get_config()->conf_path.get())) {