diff --git a/docs/usage.md b/docs/usage.md
index 8e34d40..22040bc 100644
--- a/docs/usage.md
+++ b/docs/usage.md
@@ -131,3 +131,4 @@ Command line options
 | `--mark-code`                                          | Mark code with [code]...[/code] blocks
 | `--no-wrap-links`                                      | Do not wrap links during text wrapping. Implies `--reference-links`
 | `--decode-errors`=`HANDLER`                            | What to do in case an error is encountered. `ignore`, `strict`, `replace` etc.
+| `--pad-tables`                                         | Use padding to make tables look good.
diff --git a/html2text/cli.py b/html2text/cli.py
index 7ece36d..49bef76 100644
--- a/html2text/cli.py
+++ b/html2text/cli.py
@@ -24,7 +24,7 @@ class bcolors:  # pragma: no cover
         version='%prog ' + ".".join(map(str, __version__))
     )
     p.add_option(
-        "--pad_tables",
+        "--pad-tables",
         dest="pad_tables",
         action="store_true",
         default=config.PAD_TABLES,
diff --git a/test/test_html2text.py b/test/test_html2text.py
index ade0a69..724d4d6 100644
--- a/test/test_html2text.py
+++ b/test/test_html2text.py
@@ -172,7 +172,7 @@ def test_func(self):
 
     if base_fn.startswith('pad_table'):
         module_args['pad_tables'] = True
-        cmdline_args.append('--pad_tables')
+        cmdline_args.append('--pad-tables')
 
     if base_fn not in ['bodywidth_newline.html', 'abbr_tag.html']:
         test_func = None