--- open-lldp-0.9.46/include/clif.h
+++ ../clif.h.patched
@@ -34,6 +34,7 @@
 
 #include <sys/un.h>
 #include "clif_sock.h"
+#include <sys/types.h>
 
 /**
  * struct clif - Internal structure for client interface library