diff --git a/deps/c-ares_config/ares_build.h b/deps/c-ares_config/ares_build.h
index 49037906..2ea9a63b 100644
--- a/deps/c-ares_config/ares_build.h
+++ b/deps/c-ares_config/ares_build.h
@@ -34,7 +34,7 @@
 #define CARES_TYPEOF_ARES_SSIZE_T ssize_t
 #endif
 
-#if !defined(__ANDROID__) && !defined(__APPLE__) && !defined(_WIN32) && !defined(__OpenBSD__)
+#if !defined(__ANDROID__) && !defined(__APPLE__) && !defined(_WIN32) && !defined(__OpenBSD__) && !defined(__HAIKU__)
 #define GETSERVBYNAME_R_ARGS 6
 #define GETSERVBYPORT_R_ARGS 6
 #define HAVE_GETSERVBYNAME_R 1
@@ -42,16 +42,18 @@
 #define HAVE_PIPE2 1
 #endif
 
-#if defined(__OpenBSD__)
+#if defined(__OpenBSD__) || defined(__HAIKU__)
 #define GETSERVBYNAME_R_ARGS 4
 #define GETSERVBYPORT_R_ARGS 4
 #endif
 
 #if !defined(__APPLE__) && !defined(_WIN32) && !defined(__OpenBSD__)
 #define HAVE_MALLOC_H 1
+#if !defined(__HAIKU__)
+#define HAVE_SYS_RANDOM_H 1
 #define HAVE_EPOLL 1
 #define HAVE_SYS_EPOLL_H 1
-#define HAVE_SYS_RANDOM_H 1
+#endif
 #endif
 
 #if !defined(__WIN32)
@@ -83,7 +85,9 @@
 #define HAVE_GETENV 1
 #define HAVE_GETHOSTNAME 1
 #define HAVE_GETNAMEINFO 1
+#if !defined(__HAIKU__)
 #define HAVE_GETRANDOM 1
+#endif
 #define HAVE_GETTIMEOFDAY 1
 #define HAVE_IF_INDEXTONAME 1
 #define HAVE_IF_NAMETOINDEX 1
@@ -134,7 +138,9 @@
 #define HAVE_IFADDRS_H 1
 #define HAVE_UNISTD_H 1
 #define HAVE_WRITEV 1
+#if !defined(__HAIKU__)
 #define HAVE_ARC4RANDOM_BUF 1
+#endif
 #define HAVE_GETIFADDRS 1
 #define HAVE_STAT 1
 #define CARES_RANDOM_FILE "/dev/urandom"