diff --git a/include/spdlog/sinks/syslog_sink.h b/include/spdlog/sinks/syslog_sink.h
index 2f4e3fde..b1af2071 100644
--- a/include/spdlog/sinks/syslog_sink.h
+++ b/include/spdlog/sinks/syslog_sink.h
@@ -5,6 +5,7 @@
 
 #include <spdlog/sinks/base_sink.h>
 #include <spdlog/details/null_mutex.h>
+#include <spdlog/details/synchronous_factory.h>
 
 #include <array>
 #include <string>
@@ -92,14 +93,14 @@ using syslog_sink_st = syslog_sink<details::null_mutex>;
 } // namespace sinks
 
 // Create and register a syslog logger
-template<typename Factory = default_factory>
+template<typename Factory = synchronous_factory>
 inline std::shared_ptr<logger> syslog_logger_mt(const std::string &logger_name, const std::string &syslog_ident = "", int syslog_option = 0,
     int syslog_facility = LOG_USER, bool enable_formatting = false)
 {
     return Factory::template create<sinks::syslog_sink_mt>(logger_name, syslog_ident, syslog_option, syslog_facility, enable_formatting);
 }
 
-template<typename Factory = default_factory>
+template<typename Factory = synchronous_factory>
 inline std::shared_ptr<logger> syslog_logger_st(const std::string &logger_name, const std::string &syslog_ident = "", int syslog_option = 0,
     int syslog_facility = LOG_USER, bool enable_formatting = false)
 {