diff --git a/src/pip/_internal/cli/cmdoptions.py b/src/pip/_internal/cli/cmdoptions.py
index 71b1d190691..ec5272bfef2 100644
--- a/src/pip/_internal/cli/cmdoptions.py
+++ b/src/pip/_internal/cli/cmdoptions.py
@@ -965,7 +965,6 @@ def check_list_path_option(options: Values) -> None:
     action="append",
     default=[],
     choices=[
-        "legacy-resolver",
         "out-of-tree-build",
         "backtrack-on-build-failures",
         "html5lib",