diff --git a/src/redis-benchmark.c b/src/redis-benchmark.c
index 2eb689e9f..1ee562f20 100644
--- a/src/redis-benchmark.c
+++ b/src/redis-benchmark.c
@@ -1614,7 +1614,9 @@ usage:
 " -a <password>      Password for Redis Auth\n"
 " --user <username>  Used to send ACL style 'AUTH username pass'. Needs -a.\n"
 " -u <uri>           Server URI.\n"
-" -c <clients>       Number of parallel connections (default 50)\n"
+" -c <clients>       Number of parallel connections (default 50).\n"
+"                    Note: If --cluster is used then number of clients has to be\n"
+"                    the same or higher than the number of nodes.\n"
 " -n <requests>      Total number of requests (default 100000)\n"
 " -d <size>          Data size of SET/GET value in bytes (default 3)\n"
 " --dbnum <db>       SELECT the specified db number (default 0)\n"