diff --git a/src/redis-benchmark.c b/src/redis-benchmark.c
index 2e67f102..6192d340 100644
--- a/src/redis-benchmark.c
+++ b/src/redis-benchmark.c
@@ -557,7 +557,7 @@ usage:
 " -c <clients>       Number of parallel connections (default 50)\n"
 " -n <requests>      Total number of requests (default 10000)\n"
 " -d <size>          Data size of SET/GET value in bytes (default 2)\n"
-" -dbnum <db>        SELECT the specified db number (default 0)\n"
+" --dbnum <db>        SELECT the specified db number (default 0)\n"
 " -k <boolean>       1=keep alive 0=reconnect (default 1)\n"
 " -r <keyspacelen>   Use random keys for SET/GET/INCR, random values for SADD\n"
 "  Using this option the benchmark will expand the string __rand_int__\n"