1 files changed, 3 insertions, 1 deletions

diff --git a/src/emacs.c b/src/emacs.c
index 917cd43c440..94f58d890a3 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -452,12 +452,14 @@ main (argc, argv, envp)
       signal (20, fatal_error_signal);
       signal (21, fatal_error_signal);
       signal (22, fatal_error_signal);
-      signal (23, fatal_error_signal);
       signal (24, fatal_error_signal);
+#if 0 /* mvn@library.ucla.edu says these are SIGIO on AIX 3.2.4.  */
+      signal (23, fatal_error_signal);
 #ifdef SIGIO
       signal (SIGAIO, fatal_error_signal);
       signal (SIGPTY, fatal_error_signal);
 #endif
+#endif
 #ifndef _I386
       signal (SIGIOINT, fatal_error_signal);
 #endif