diff --git a/tools/network_emulator/emulate.py b/tools/network_emulator/emulate.py
index beaaf60069..1c2cf3aaad 100755
--- a/tools/network_emulator/emulate.py
+++ b/tools/network_emulator/emulate.py
@@ -154,7 +154,7 @@ def _main():
   try:
     emulator.check_permissions()
   except network_emulator.NetworkEmulatorError as e:
-    logging.error('Error: %s\n\nCause: %s', e.msg, e.error)
+    logging.error('Error: %s\n\nCause: %s', e.fail_msg, e.error)
     return -1
 
   if not options.target_ip:
@@ -186,7 +186,7 @@ def _main():
     logging.info('Completed Network Emulation.')
     return 0
   except network_emulator.NetworkEmulatorError as e:
-    logging.error('Error: %s\n\nCause: %s', e.msg, e.error)
+    logging.error('Error: %s\n\nCause: %s', e.fail_msg, e.error)
     return -2
 
 if __name__ == '__main__':
diff --git a/tools/network_emulator/network_emulator.py b/tools/network_emulator/network_emulator.py
index 08d8255929..2531f1ed8c 100644
--- a/tools/network_emulator/network_emulator.py
+++ b/tools/network_emulator/network_emulator.py
@@ -97,7 +97,7 @@ class NetworkEmulator(object):
     # AttributeError will be raised on Windows.
       if ctypes.windll.shell32.IsUserAnAdmin() == 0:
         raise NetworkEmulatorError('You must run this script with administrator'
-                                   'privileges.')
+                                   ' privileges.')
 
   def _create_dummynet_rule(self, pipe_id, from_address, to_address,
                             port_range):
@@ -169,7 +169,7 @@ def _run_ipfw_command(command, fail_msg=None):
     fail_msg: Message describing the error in case the command fails.
 
   Raises:
-    NetworkEmulatorError: If command fails. Message is set by the fail_msg
+    NetworkEmulatorError: If command fails a message is set by the fail_msg
     parameter.
   """
   if sys.platform == 'win32':