diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_STDARG_H.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_STDARG_H.h
new file mode 100644
index 0000000..1ccc33f
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_STDARG_H.h
@@ -0,0 +1,5 @@
+// HAVE_STDARG_H
+
+#undef HAVE_STDARG_H
+
+#define HAVE_STDARG_H 1
diff --git a/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_STDDEF_H.h b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_STDDEF_H.h
new file mode 100644
index 0000000..495c174
--- /dev/null
+++ b/libbuild2-autoconf/libbuild2/autoconf/checks/HAVE_STDDEF_H.h
@@ -0,0 +1,5 @@
+// HAVE_STDLIB_H
+
+#undef HAVE_STDLIB_H
+
+#define HAVE_STDLIB_H 1