diff --git a/include/spdlog/details/file_helper.h b/include/spdlog/details/file_helper.h
index 8ae67bf0..8e1f600b 100644
--- a/include/spdlog/details/file_helper.h
+++ b/include/spdlog/details/file_helper.h
@@ -87,6 +87,10 @@ public:
 
     }
 
+    void flush() {
+        std::fflush(_fd);
+    }
+
     void close()
     {
         if (_fd)
diff --git a/include/spdlog/details/logger_impl.h b/include/spdlog/details/logger_impl.h
index 1a920c03..fa4731ae 100644
--- a/include/spdlog/details/logger_impl.h
+++ b/include/spdlog/details/logger_impl.h
@@ -312,4 +312,8 @@ inline void spdlog::logger::_set_formatter(formatter_ptr msg_formatter)
     _formatter = msg_formatter;
 }
 
-
+inline void spdlog::logger::flush() {
+    for (auto& sink : _sinks) {
+        sink->flush();
+    }
+}
\ No newline at end of file
diff --git a/include/spdlog/logger.h b/include/spdlog/logger.h
index cf97fc80..7a5a31a7 100644
--- a/include/spdlog/logger.h
+++ b/include/spdlog/logger.h
@@ -107,6 +107,7 @@ public:
     void set_pattern(const std::string&);
     void set_formatter(formatter_ptr);
 
+    void flush();
 
 protected:
     virtual void _log_msg(details::log_msg&);
diff --git a/include/spdlog/sinks/base_sink.h b/include/spdlog/sinks/base_sink.h
index f1647ae0..12d63ea8 100644
--- a/include/spdlog/sinks/base_sink.h
+++ b/include/spdlog/sinks/base_sink.h
@@ -58,7 +58,6 @@ public:
         _sink_it(msg);
     }
 
-
 protected:
     virtual void _sink_it(const details::log_msg& msg) = 0;
     Mutex _mutex;
diff --git a/include/spdlog/sinks/file_sinks.h b/include/spdlog/sinks/file_sinks.h
index 9ec8f46b..0e705337 100644
--- a/include/spdlog/sinks/file_sinks.h
+++ b/include/spdlog/sinks/file_sinks.h
@@ -80,6 +80,10 @@ public:
         _file_helper.open(calc_filename(_base_filename, 0, _extension));
     }
 
+    virtual void flush() override {
+        _file_helper.flush();
+    }
+
 protected:
     void _sink_it(const details::log_msg& msg) override
     {
@@ -167,6 +171,10 @@ public:
         _file_helper.open(calc_filename(_base_filename, _extension));
     }
 
+    virtual void flush() override {
+        _file_helper.flush();
+    }
+
 protected:
     void _sink_it(const details::log_msg& msg) override
     {
diff --git a/include/spdlog/sinks/null_sink.h b/include/spdlog/sinks/null_sink.h
index 2cd416a9..992b3b73 100644
--- a/include/spdlog/sinks/null_sink.h
+++ b/include/spdlog/sinks/null_sink.h
@@ -40,6 +40,9 @@ protected:
     void _sink_it(const details::log_msg&) override
     {}
 
+    void flush() override
+    {}
+
 };
 typedef null_sink<details::null_mutex> null_sink_st;
 typedef null_sink<std::mutex> null_sink_mt;
diff --git a/include/spdlog/sinks/ostream_sink.h b/include/spdlog/sinks/ostream_sink.h
index 91580301..7b6b9db3 100644
--- a/include/spdlog/sinks/ostream_sink.h
+++ b/include/spdlog/sinks/ostream_sink.h
@@ -51,6 +51,11 @@ protected:
         if (_force_flush)
             _ostream.flush();
     }
+
+    virtual void flush() override {
+        _ostream.flush();
+    }
+
     std::ostream& _ostream;
     bool _force_flush;
 };
diff --git a/include/spdlog/sinks/sink.h b/include/spdlog/sinks/sink.h
index 0905d52f..88c423a0 100644
--- a/include/spdlog/sinks/sink.h
+++ b/include/spdlog/sinks/sink.h
@@ -35,6 +35,7 @@ class sink
 public:
     virtual ~sink() {}
     virtual void log(const details::log_msg& msg) = 0;
+    virtual void flush() = 0;
 };
 }
 }
diff --git a/include/spdlog/sinks/syslog_sink.h b/include/spdlog/sinks/syslog_sink.h
index 7d729743..15a96fee 100644
--- a/include/spdlog/sinks/syslog_sink.h
+++ b/include/spdlog/sinks/syslog_sink.h
@@ -78,6 +78,8 @@ public:
         ::syslog(syslog_prio_from_level(msg), "%s", msg.formatted.str().c_str());
     }
 
+    virtual void flush() override {
+    }
 
 
 private: