diff --git a/ioping/telegraf-ioping.py b/ioping/telegraf-ioping.py
index ad6155f..9838c3a 100644
--- a/ioping/telegraf-ioping.py
+++ b/ioping/telegraf-ioping.py
@@ -58,7 +58,6 @@ def ioping_output_shell():
         print(stdout)
     else:
         print(stderr)
-
     return returncode
 
 
@@ -71,17 +70,17 @@ def ioping_output_telegraf():
         return returncode
 
     ioping_statistic_keys = [
-            'statistics_count',
-            'runtime',
-            'iops',
-            'transfer_speed',
-            'min_request_time',
-            'avg_request_time',
-            'max_request_time',
-            'std_deviation_request_time',
-            'total_requests',
-            'total_running_time'
-            ]
+        'statistics_count',
+        'runtime',
+        'iops',
+        'transfer_speed',
+        'min_request_time',
+        'avg_request_time',
+        'max_request_time',
+        'std_deviation_request_time',
+        'total_requests',
+        'total_running_time'
+    ]
 
     try:
         ioping_statistics = dict(zip(ioping_statistic_keys, stdout.split()))
@@ -97,24 +96,24 @@ def ioping_output_telegraf():
 def get_parser():
     parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
     parser.add_argument('-c', '--count',
-                        help = 'stop after <count> requests',
-                        default = '10')
+        help = 'stop after <count> requests',
+        default = '10')
     parser.add_argument('-i', '--interval',
-                        help = 'interval between requests',
-                        default = '1s')
-    parser.add_argument('--iointerface',
-                        help = 'Which ionterface to use: async|cached|direct|sync|dsync',
-                        default = '')
+        help = 'interval between requests',
+        default = '1s')
     parser.add_argument('-l', '--location',
-                        help = 'directory|file|device to test. Best would be a directory to not shred anything accidentially',
-                        default = '/tmp')
+        help = 'directory|file|device to test. Best would be a directory to not shred anything accidentially',
+        default = '/tmp')
     parser.add_argument('-m', '--mode',
-                        help = 'Which output to use: shell|telegraf',
-                        default = 'telegraf')
+        help = 'Which output to use: shell|telegraf',
+        default = 'telegraf')
+    parser.add_argument('-n', '--iointerface',
+        help = 'Which ionterface to use: async|cached|direct|sync|dsync',
+        default = '')
     parser.add_argument('-w', '--read-write',
-                        help = 'Use read-write test instead of read.',
-                        action = 'store_true',
-                        default = 'False')
+        help = 'Use read-write test instead of read.',
+        action = 'store_true',
+        default = 'False')
     return parser