diff --git a/sys/vms/lev_lex.h b/sys/vms/lev_lex.h
new file mode 100644
index 000000000..0464fec8a
--- /dev/null
+++ b/sys/vms/lev_lex.h
@@ -0,0 +1,25 @@
+/*	SCCS Id: @(#)lev_lex.h	3.3	1999/08/08	*/
+/* "vms/lev_lex.h" copied into "util/stdio.h" for use in *_lex.c only!
+ * This is an awful kludge to allow util/*_lex.c made by SunOS's `lex'
+ * to be compiled as is.  (It isn't needed with `flex' or VMS POSIX
+ * `lex' and is benign when either of those configurations are used.)
+ * It works because the actual setup of yyin & yyout is performed in
+ * src/lev_main.c, where stdin & stdout are still correctly defined.
+ *
+ * The troublesome code is
+ *	#include "stdio.h"
+ *		...
+ *	FILE *yyin = stdin, *yyout = stdout;
+ * The file scope initializers with non-constant values require this
+ * hack, and the quotes instead of brackets makes it easy to do.
+ */
+
+#include <stdio.h>
+#ifdef stdin
+# undef stdin
+#endif
+#define stdin  0
+#ifdef stdout
+# undef stdout
+#endif
+#define stdout 0