Update README.md

README.md

@@ -76,7 +76,7 @@ options:
   -o OUTPUT_DIRECTORY, --output-directory OUTPUT_DIRECTORY
                         Directory name where to save the topology data. I.e.: my_topology. Default is the actual date/time in "--time-format" format.
                         NOTE: the directory is a sub directory under "~/var/topology_data/"
-  -m, --make_default    Set the created topology data as default
+  -m, --make-default    Set the created topology data as default
   -k, --keep-domain     Do not remove the domain name from the neighbor name
   -u, --uppercase       Change neighbour names to all upper case
   -l, --lowercase       Change neighbour names to all lower case