--- libvncclient/sasl.h.orig
+++ libvncclient/sasl.h
@@ -23,6 +23,7 @@
 #ifdef LIBVNCSERVER_HAVE_SASL
 
 #include <rfb/rfbclient.h>
+#include <sys/socket.h>
 
 /*
  *  Perform the SASL authentication process