diff --git a/unix.c b/unix.c
index e27a51f5..ef9e426d 100644
--- a/unix.c
+++ b/unix.c
@@ -164,7 +164,7 @@
 #include <poll.h>
 #endif
 
-#if !defined(HAS_SOCKLEN_T) && !defined(__socklen_t_defined)
+#if !defined(HAS_SOCKLEN_T) && !defined(__socklen_t_defined) && !defined(__HAIKU__)
 typedef int socklen_t;
 #endif