diff --git a/make_machdep/make_machdep.py b/make_machdep/make_machdep.py
index dd078e3988628cfe6ba0f4a185f30bd8668beb18..0a29f3272fac29a2dfd4a9ee284db6f51f6dc4a6 100755
--- a/make_machdep/make_machdep.py
+++ b/make_machdep/make_machdep.py
@@ -126,8 +126,6 @@ machdep = {
     "alignof_str": None,
     "alignof_fun": None,
     "char_is_unsigned": None,
-    "underscore_name": None,
-    "const_string_literals": None,
     "little_endian": None,
     "alignof_aligned": None,
     "has__builtin_va_list": None,
@@ -166,7 +164,6 @@ source_files = [
     ("ptrdiff_t.c", "type"),
     ("char_is_unsigned.c", "bool"),
     ("little_endian.c", "bool"),
-    ("const_string_literals.c", "const_string_literals"),
     ("has__builtin_va_list.c", "has__builtin_va_list"),
 ]