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-rw-r--r--sys/src/cmd/rio/rio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/src/cmd/rio/rio.c b/sys/src/cmd/rio/rio.c
index a3fff059e..9b3f70522 100644
--- a/sys/src/cmd/rio/rio.c
+++ b/sys/src/cmd/rio/rio.c
@@ -114,7 +114,7 @@ derror(Display*, char *errorstr)
void
usage(void)
{
- fprint(2, "usage: rio [-f font] [-i initcmd] [-k kbdcmd] [-s]\n");
+ fprint(2, "usage: rio [-b] [-f font] [-i initcmd] [-k kbdcmd] [-s]\n");
exits("usage");
}