1 files changed, 2 insertions, 1 deletions
diff --git a/stream.h b/stream.h
index 6bf7c5e6..604a5e78 100644
--- a/stream.h
+++ b/stream.h
@@ -24,7 +24,7 @@
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
-extern val std_input, std_output, std_debug, std_error;
+extern val std_input, std_output, std_debug, std_error, std_null;
 extern val output_produced;
 
 extern val dev_k, ino_k, mode_k, nlink_k, uid_k;
@@ -38,6 +38,7 @@ extern val s_ifchr, s_ififo, s_isuid, s_isgid, s_isvtx, s_irwxu;
 extern val s_irusr, s_iwusr, s_ixusr, s_irwxg, s_irgrp, s_iwgrp;
 extern val s_ixgrp, s_irwxo, s_iroth, s_iwoth, s_ixoth;
 
+val make_null_stream(void);
 val make_stdio_stream(FILE *, val descr);
 val make_tail_stream(FILE *, val descr);
 val make_pipe_stream(FILE *, val descr);