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-rw-r--r--Modules/posixmodule.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 4e7f9bc..ab4992e 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -2573,7 +2573,8 @@ posix_fork(PyObject *self, PyObject *noargs)
#endif
/* AIX uses /dev/ptc but is otherwise the same as /dev/ptmx */
-#ifdef HAVE_DEV_PTC
+/* IRIX has both /dev/ptc and /dev/ptmx, use ptmx */
+#if defined(HAVE_DEV_PTC) && !defined(HAVE_DEV_PTMX)
#define DEV_PTY_FILE "/dev/ptc"
#define HAVE_DEV_PTMX
#else