diff --git a/sys/sys/fcntl.h b/sys/sys/fcntl.h
index e2597726c53b..3c29c04e46db 100644
--- a/sys/sys/fcntl.h
+++ b/sys/sys/fcntl.h
@@ -141,7 +141,7 @@ typedef	__pid_t		pid_t;
 					   return back */
 #endif
 
-#define	O_DSYNC		0x00800000	/* POSIX data sync */
+#define	O_DSYNC		0x01000000	/* POSIX data sync */
 
 /*
  * XXX missing O_RSYNC.