diff --git a/network_core.h b/network_core.h
index 7ca53a9444..2d9f83c7b7 100644
--- a/network_core.h
+++ b/network_core.h
@@ -88,6 +88,10 @@ typedef struct ifreq IFREQ;
 #	include <netdb.h>
 #endif // UNIX
 
+#ifdef __BEOS__
+typedef int socklen_t;
+#endif
+
 // OS/2 stuff
 #if defined(__OS2__)
 #	define SOCKET int