diff --git a/netem.py b/netem.py
index fea5f06e747f21debd13c4d1e6db53e69bd3aa42..5056898d1339c648f4fce12bbd1ff60ba8376853 100755
--- a/netem.py
+++ b/netem.py
@@ -19,11 +19,11 @@ parser.add_argument('-B', '--bandwidth',
                     )
 parser.add_argument('-D', '--delay',
                     dest='delay',
-                    help='link latency (in milliseconds)'
+                    help='link latency (eg, 10ms)'
                     )
 parser.add_argument('-L', '--loss',
                     dest='loss',
-                    help='loss rate'
+                    help='loss rate (between 0 and 100)'
                     )
 
 args = parser.parse_args()