diff --git a/src/vol/fssync.c b/src/vol/fssync.c
index 5b0a3b22e2..5751c22546 100644
--- a/src/vol/fssync.c
+++ b/src/vol/fssync.c
@@ -55,11 +55,11 @@ RCSID
 
 #include <sys/types.h>
 #include <stdio.h>
-#include <unistd.h>
 #ifdef AFS_NT40_ENV
 #include <winsock2.h>
 #include <time.h>
 #else
+#include <unistd.h>
 #include <sys/param.h>
 #include <sys/socket.h>
 #include <netinet/in.h>