diff --git a/contrib/sockets/sockets.lisp b/contrib/sockets/sockets.lisp
index 6c113681e..140d7c4ac 100644
--- a/contrib/sockets/sockets.lisp
+++ b/contrib/sockets/sockets.lisp
@@ -37,6 +37,8 @@
  "#include <sys/types.h>"
  "#include <sys/socket.h>"
  "#include <sys/un.h>"
+ #-:win32
+ "#include <sys/time.h>"
  "#include <netdb.h>"
  "#include <string.h>"
  "#include <netinet/in.h>"