diff --git a/Server/server.c b/Server/server.c
index 0328977..dd97320 100644
--- a/Server/server.c
+++ b/Server/server.c
@@ -79,7 +79,7 @@ int tw_wildcard_match(const char* wildcard, const char* target) {
 }
 
 void close_socket(int sock) {
-#ifdef __MINGW32__
+#if defined(__MINGW32__) || defined(__HAIKU__)
 	closesocket(sock);
 #else
 	close(sock);