Fix help typo.
diff --git a/main.c b/main.c
index 881826a..1e3c967 100644
--- a/main.c
+++ b/main.c
@@ -305,7 +305,7 @@ static struct opt_table opt_config_table[] = {
#ifdef HAVE_OPENCL
OPT_WITH_ARG("--device|-d",
set_devices, NULL, &opt_device,
- "Select device to use, (Use repeat -d for mulitple devices, default: all)"),
+ "Select device to use, (Use repeat -d for multiple devices, default: all)"),
OPT_WITH_ARG("--gpu-threads|-g",
set_int_0_to_10, opt_show_intval, &opt_g_threads,
"Number of threads per GPU (0 - 10)"),