diff --git a/unix.c b/unix.c
index a636f03..491a259 100644
--- a/unix.c
+++ b/unix.c
@@ -53,7 +53,7 @@
 #include <poll.h>
 #endif
 
-#ifndef HAS_SOCKLEN_T
+#if !defined(HAS_SOCKLEN_T) && !defined(__socklen_t_defined)
 typedef int socklen_t;
 #endif