diff --git a/src/log/file_appender.cpp b/src/log/file_appender.cpp
index e6d32d3..be9a99a 100644
--- a/src/log/file_appender.cpp
+++ b/src/log/file_appender.cpp
@@ -153,7 +153,11 @@ namespace fc {
    {
       std::stringstream line;
       //line << (m.get_context().get_timestamp().time_since_epoch().count() % (1000ll*1000ll*60ll*60))/1000 <<"ms ";
-      line << string(m.get_context().get_timestamp()) << " ";
+      //line << string(m.get_context().get_timestamp()) << " ";
+      time_point timestamp = m.get_context().get_timestamp();
+      line << string(timestamp);
+      uint64_t milliseconds = (timestamp.time_since_epoch().count() % 1000000) / 1000;
+      line << "." << std::setw(3) << std::setfill('0') << milliseconds << " ";
       line << std::setw( 21 ) << (m.get_context().get_thread_name().substr(0,9) + string(":") + m.get_context().get_task_name()).c_str() << " ";
 
       string method_name = m.get_context().get_method();