diff --git a/mopidy/__main__.py b/mopidy/__main__.py
index d7d74db5..71330050 100644
--- a/mopidy/__main__.py
+++ b/mopidy/__main__.py
@@ -134,10 +134,6 @@ def parse_options():
         b'--list-deps',
         action='callback', callback=deps.list_deps_optparse_callback,
         help='list dependencies and their versions')
-    parser.add_option(
-        b'--debug-thread',
-        action='store_true', dest='debug_thread',
-        help='run background thread that dumps tracebacks on SIGUSR1')
     parser.add_option(
         b'-o', b'--option',
         action='append', dest='overrides', type='config_override',