diff --git a/bin/start.sh b/bin/start.sh
index 46f3b070becc81c8cb23c2c1bc189b4c499a125f..203e174b5e65f3a528af7f6145d20220ee64f282 100755
--- a/bin/start.sh
+++ b/bin/start.sh
@@ -110,7 +110,7 @@ function startgeth
 	    unset xtra
             if [ "$netport" != 30303 ]
             then
-                flexargs="${flexargs} --net $netport"
+                flexargs="${flexargs} --port $netport"
             fi
             if [ "$rpcport" != 30303 ]
             then