1 files changed, 1 insertions, 1 deletions

diff --git a/include/usage.h b/include/usage.h
index 7e23de92d..f5bd96a47 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -88,7 +88,7 @@
        "        -A              ARP answer mode, update your neighbours\n" \
        "        -c count        Stop after sending count ARP request packets\n" \
        "        -w timeout      Time to wait for ARP reply, in seconds\n" \
-       "        -i device       Outgoing interface name, default is eth0\n" \
+       "        -I device       Outgoing interface name, default is eth0\n" \
        "        -s sender       Set specific sender IP address\n" \
        "        target          Target IP address of ARP request"