diff --git a/mypy/fastparse.py b/mypy/fastparse.py
index e208e4d0b7d9..7e2ba7b712b2 100644
--- a/mypy/fastparse.py
+++ b/mypy/fastparse.py
@@ -1099,7 +1099,7 @@ def make_argument(
         if argument_elide_name(arg.arg):
             pos_only = True
 
-        argument = Argument(Var(arg.arg), arg_type, self.visit(default), kind, pos_only)
+        argument = Argument(Var(arg.arg, arg_type), arg_type, self.visit(default), kind, pos_only)
         argument.set_line(
             arg.lineno,
             arg.col_offset,