diff --git a/locust/log.py b/locust/log.py
index 36f490f61c..24ffffbef6 100644
--- a/locust/log.py
+++ b/locust/log.py
@@ -25,6 +25,10 @@ class StdOutWrapper(object):
     def write(self, s):
         stdout_logger.info(s.strip())
 
+    def flush(self, *args, **kwargs):
+        """No-op for wrapper"""
+        pass
+
 class StdErrWrapper(object):
     """
     Wrapper for stderr
@@ -32,6 +36,10 @@ class StdErrWrapper(object):
     def write(self, s):
         stderr_logger.error(s.strip())
 
+    def flush(self, *args, **kwargs):
+        """No-op for wrapper"""
+        pass
+
 # set up logger for the statistics tables
 console_logger = logging.getLogger("console_logger")
 # create console handler