diff --git a/hydra.c b/hydra.c
index 59b7c8c..cd42144 100644
--- a/hydra.c
+++ b/hydra.c
@@ -475,6 +475,7 @@ void help(int32_t ext) {
 #ifdef HAVE_MATH_H
                     "  -x MIN:MAX:CHARSET  password bruteforce generation, type \"-x -h\" to get help\n"
                     "  -y        disable use of symbols in bruteforce, see above\n"
+                    "  -r		 rainy mode for password generation (-x)\n"
 #endif
                     "  -e nsr    try \"n\" null password, \"s\" login as pass and/or \"r\" reversed login\n"
                     "  -u        loop around users, not passwords (effective! implied with -x)\n");