diff --git a/lib/socket-util.c b/lib/socket-util.c
index 5301d271a..f7d2d0f49 100644
--- a/lib/socket-util.c
+++ b/lib/socket-util.c
@@ -1047,6 +1047,7 @@ get_mtime(const char *file_name, struct timespec *mtime)
     }
 }
 
+#ifndef _WIN32
 void
 xpipe(int fds[2])
 {
@@ -1062,6 +1063,7 @@ xpipe_nonblocking(int fds[2])
     xset_nonblocking(fds[0]);
     xset_nonblocking(fds[1]);
 }
+#endif
 
 static int
 getsockopt_int(int fd, int level, int option, const char *optname, int *valuep)
diff --git a/lib/socket-util.h b/lib/socket-util.h
index 92f0c6f71..2acc97414 100644
--- a/lib/socket-util.h
+++ b/lib/socket-util.h
@@ -65,8 +65,10 @@ int write_fully(int fd, const void *, size_t, size_t *bytes_written);
 int fsync_parent_dir(const char *file_name);
 int get_mtime(const char *file_name, struct timespec *mtime);
 
+#ifndef _WIN32
 void xpipe(int fds[2]);
 void xpipe_nonblocking(int fds[2]);
+#endif
 
 char *describe_fd(int fd);