- (dtucker) [monitor_fdpass.c] Include sys/in.h, required for cmsg macros
   on older (2.0) Linuxes.  Based on patch from thmo-13 at gmx de.
diff --git a/monitor_fdpass.c b/monitor_fdpass.c
index c5fc4c3..9f8e9cd 100644
--- a/monitor_fdpass.c
+++ b/monitor_fdpass.c
@@ -29,6 +29,9 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
+#ifdef HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
 
 #include <errno.h>
 #include <string.h>