diff --git a/libc/include/netinet/in.h b/libc/include/netinet/in.h
index 1c9961c..7f00a7a 100644
--- a/libc/include/netinet/in.h
+++ b/libc/include/netinet/in.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _NETINET_IN_H_
-#define _NETINET_IN_H_
+#pragma once
 
 #include <endian.h>
 #include <netinet/in6.h>
@@ -46,14 +45,12 @@
 
 int bindresvport(int __fd, struct sockaddr_in* __sin);
 
-#if __ANDROID_API__ >= __ANDROID_API_N__
+#if __ANDROID_API__ >= 24
 extern const struct in6_addr in6addr_any __INTRODUCED_IN(24);
 extern const struct in6_addr in6addr_loopback __INTRODUCED_IN(24);
 #else
 static const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
 static const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
-#endif /* __ANDROID_API__ >= __ANDROID_API_N__ */
+#endif
 
 __END_DECLS
-
-#endif