diff --git a/Util/simple_logger.hpp b/Util/simple_logger.hpp
index 2f7d1ed79..077fa2e41 100644
--- a/Util/simple_logger.hpp
+++ b/Util/simple_logger.hpp
@@ -67,8 +67,8 @@ class SimpleLogger
     std::ostringstream &Write(LogLevel l = logINFO);
 
   private:
-    LogLevel level;
     std::ostringstream os;
+    LogLevel level;
 };
 
 #endif /* SIMPLE_LOGGER_HPP */