--- IO-FDPass/FDPass.xs	2014/10/31 07:09:43	1.6
+++ IO-FDPass/FDPass.xs	2016/07/11 23:00:00	1.7
@@ -34,11 +34,11 @@
   #include <sys/socket.h>
 
   #ifndef CMSG_SPACE
-  # define CMSG_SPACE(len) (sizeof (cmsghdr) + len)
+  # define CMSG_SPACE(len) (sizeof (struct cmsghdr) + len)
   #endif
 
   #ifndef CMSG_LEN
-  # define CMSG_LEN(len) (sizeof (cmsghdr) + len)
+  # define CMSG_LEN(len) (sizeof (struct cmsghdr) + len)
   #endif
 
 #endif