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-rw-r--r--sub_client.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sub_client.c b/sub_client.c
index 474e051..382cc13 100644
--- a/sub_client.c
+++ b/sub_client.c
@@ -518,7 +518,7 @@ void print_usage(void)
printf(" allowed masks are:\n");
printf(" @[epoch|date|year|month|day|datetime|hour|min|sec|id|topic[1-9]] \n");
printf(" eg. --fmask='@id@date@topic' for file id-2010-12-21-topicname\n");
- printf(" --overwrite : overwrite the existing output file.\n");
+ printf(" --overwrite : overwrite the existing output file, can be used with --fmask only.\n");
printf(" --will-payload : payload for the client Will, which is sent by the broker in case of\n");
printf(" unexpected disconnection. If not given and will-topic is set, a zero\n");
printf(" length message will be sent.\n");