diff --git a/src/core/ngx_inet.h b/src/core/ngx_inet.h
index f5f5e0d..074d43c 100644
--- a/src/core/ngx_inet.h
+++ b/src/core/ngx_inet.h
@@ -4,7 +4,7 @@
 
 size_t ngx_sock_ntop(int family, struct sockaddr *addr, u_char *text,
                      size_t len);
-size_t ngx_inet_ntop(int family, u_char *addr, u_char *text, size_t len);
+size_t ngx_inet_ntop(int family, void *addr, u_char *text, size_t len);
 
 
 #endif /* _NGX_INET_H_INCLUDED_ */