diff --git a/avocado/plugins/runner.py b/avocado/plugins/runner.py
index 3164bb2f830978d8baf11aa212ed6a83c6e27035..16e11e49eb02928055c2d9b053a4665c11b6f967 100644
--- a/avocado/plugins/runner.py
+++ b/avocado/plugins/runner.py
@@ -111,7 +111,8 @@ class TestRunner(plugin.Plugin):
         if multiplexer.MULTIPLEX_CAPABLE:
             mux = self.parser.add_argument_group('multiplex arguments')
             mux.add_argument('-m', '--multiplex-files', nargs='*', default=None,
-                             help='Path(s) to a avocado multiplex (.yaml) file(s)')
+                             help='Path(s) to a avocado multiplex (.yaml) '
+                             'file(s) (order dependent)')
             mux.add_argument('--filter-only', nargs='*', default=[],
                              help='Filter only path(s) from multiplexing')
             mux.add_argument('--filter-out', nargs='*', default=[],