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-rw-r--r--bits/uio-ext.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/bits/uio-ext.h b/bits/uio-ext.h
index 8c15a05d9a..d5aa06fd08 100644
--- a/bits/uio-ext.h
+++ b/bits/uio-ext.h
@@ -28,5 +28,6 @@
 #define RWF_DSYNC	0x00000002 /* per-IO O_DSYNC.  */
 #define RWF_SYNC	0x00000004 /* per-IO O_SYNC.  */
 #define RWF_NOWAIT	0x00000008 /* per-IO nonblocking mode.  */
+#define RWF_APPEND	0x00000010 /* per-IO O_APPEND.  */
 
 #endif /* sys/uio_ext.h */