--- Libc/Libc-320.1.3/include/strings.h
+++ Libc/Libc-1669.40.2/include/strings.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000, 2007, 2010, 2023 Apple Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
@@ -55,4 +55,14 @@
  *	@(#)strings.h	8.1 (Berkeley) 6/2/93
  */
 
+#ifndef _STRINGS_H_
+#define _STRINGS_H_
+
+#include <_strings.h>
+
+#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 #include <string.h>
+#endif
+
+#endif  /* _STRINGS_H_ */
+