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-rw-r--r--src/stty.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/stty.c b/src/stty.c
index 5d8e864fd..ad0d6f1ba 100644
--- a/src/stty.c
+++ b/src/stty.c
@@ -129,6 +129,9 @@
#if defined(VDISCARD) && !defined(VFLUSHO)
#define VFLUSHO VDISCARD
#endif
+#if defined(VFLUSH) && !defined(VFLUSHO) /* Ultrix 4.2 */
+#define VFLUSHO VFLUSH
+#endif
#if defined(VFLUSHO) && !defined(CFLUSHO)
#define CFLUSHO Control ('o')
#endif