diff --git a/ChangeLog b/ChangeLog
index 53c1d0cf..ab8e97cc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2012-02-03  Eli Zaretskii  <eliz@gnu.org>
 
+	* w32/subproc/sub_proc.c (proc_stdin_thread, proc_stdout_thread)
+	(proc_stderr_thread, process_pipe_io): Ifdef away unused
+	functions.
+
 	* w32/subproc/w32err.c (map_windows32_error_to_string) [_MSC_VER]:
 	Don't use TLS storage for szMessageBuffer.  Ifdef away special
 	code for handling Winsock error codes.  Make the function return a
diff --git a/w32/subproc/sub_proc.c b/w32/subproc/sub_proc.c
index 2b1b29ce..799bbd6a 100644
--- a/w32/subproc/sub_proc.c
+++ b/w32/subproc/sub_proc.c
@@ -731,6 +731,7 @@ process_begin(
 
 
 
+#if 0	/* unused */
 static DWORD
 proc_stdin_thread(sub_process *pproc)
 {
@@ -975,6 +976,7 @@ process_pipe_io(
 		return(0);
 
 }
+#endif	/* unused */
 
 /*
  * Purpose: collects output from child process and returns results