diff --git a/libc/include/netdb.h b/libc/include/netdb.h
index 66ec8e3..816acc5 100644
--- a/libc/include/netdb.h
+++ b/libc/include/netdb.h
@@ -196,33 +196,37 @@
 
 __BEGIN_DECLS
 
-#define h_errno (*__get_h_errno())
-int* __get_h_errno(void);
+/* BIONIC-BEGIN */
+#define  h_errno   (*__get_h_errno())
+int*  __get_h_errno(void);
+/* BIONIC-END */
 void endservent(void);
-struct hostent* gethostbyaddr(const void* __addr, socklen_t __length, int __type);
-int gethostbyaddr_r(const void* __addr, socklen_t __length, int __type, struct hostent* __ret, char* __buf, size_t __buf_size, struct hostent** __result, int* __h_errno_ptr) __INTRODUCED_IN(23);
-struct hostent* gethostbyname(const char* __name);
-int gethostbyname_r(const char* __name, struct hostent* __ret, char* __buf, size_t __buf_size, struct hostent** __result, int* __h_errno_ptr);
-struct hostent* gethostbyname2(const char* __name, int __af);
-int gethostbyname2_r(const char* __name, int __af, struct hostent* __ret, char* __buf, size_t __buf_size, struct hostent** __result, int* __h_errno_ptr) __INTRODUCED_IN(23);
+struct hostent* gethostbyaddr(const void*, socklen_t, int);
+int gethostbyaddr_r(const void*, socklen_t, int, struct hostent*, char*, size_t, struct hostent**,
+                    int*) __INTRODUCED_IN(23);
+struct hostent* gethostbyname(const char*);
+int gethostbyname_r(const char*, struct hostent*, char*, size_t, struct hostent**, int*);
+struct hostent* gethostbyname2(const char*, int);
+int gethostbyname2_r(const char*, int, struct hostent*, char*, size_t, struct hostent**, int*)
+  __INTRODUCED_IN(23);
 struct hostent* gethostent(void);
-struct netent* getnetbyaddr(uint32_t __net, int __type);
-struct netent* getnetbyname(const char* __name);
-struct protoent* getprotobyname(const char* __name);
-struct protoent* getprotobynumber(int __proto);
-struct servent* getservbyname(const char* __name, const char* __proto);
-struct servent* getservbyport(int __port, const char* __proto);
+struct netent* getnetbyaddr(uint32_t, int);
+struct netent* getnetbyname(const char*);
+struct protoent* getprotobyname(const char*);
+struct protoent* getprotobynumber(int);
+struct servent* getservbyname(const char*, const char*);
+struct servent* getservbyport(int, const char*);
 struct servent* getservent(void);
-void herror(const char* __s);
-const char* hstrerror(int __error);
+void herror(const char*);
+const char* hstrerror(int);
 
-int getaddrinfo(const char* __node, const char* __service, const struct addrinfo* __hints, struct addrinfo** __result);
+int getaddrinfo(const char*, const char*, const struct addrinfo*, struct addrinfo**);
 /* POSIX getnameinfo uses socklen_t, not size_t, but LP64 sizeof(socklen_t) != sizeof(size_t). */
-int getnameinfo(const struct sockaddr* __sa, socklen_t __sa_length, char* __host, size_t __host_length, char* __service, size_t __service_length, int __flags);
-void freeaddrinfo(struct addrinfo* __ptr);
-const char* gai_strerror(int __error);
-void setservent(int __stay_open);
+int getnameinfo(const struct sockaddr*, socklen_t, char*, size_t, char*, size_t, int);
+void freeaddrinfo(struct addrinfo*);
+const char* gai_strerror(int);
+void setservent(int);
 
 __END_DECLS
 
-#endif
+#endif /* !_NETDB_H_ */