diff --git a/hydra.c b/hydra.c
index 29c3ba6..35f82b4 100644
--- a/hydra.c
+++ b/hydra.c
@@ -563,17 +563,21 @@ void module_usage() {
              " failed string looks like and put it in this parameter!\n"
              "The following parameters are optional:\n"
              " C=/page/uri     to define a different page to gather initial cookies from\n"
-             " (h|H)=My-Hdr: foo   to send a user defined HTTP header with each request\n"
+             " (h|H)=My-Hdr\\: foo   to send a user defined HTTP header with each request\n"
              "                 ^USER^ and ^PASS^ can also be put into these headers!\n"
              "                 Note: 'h' will add the user-defined header at the end\n"
              "                 regardless it's already being sent by Hydra or not.\n"
              "                 'H' will replace the value of that header if it exists, by the\n"
              "                 one supplied by the user, or add the header at the end\n"
+      			 "Note that if you are going to put colons (:) in your headers you should escape them with a backslash (\).\n"
+      			 " All colons that are not option separators should be escaped (see the examples above and below).\n"
+      			 " You can specify a header without escaping the colons, but that way you will not be able to put colons\n"
+      			 " in the header value itself, as they will be interpreted by hydra as option separators.\n"
              "\nExamples:\n"
              " \"/login.php:user=^USER^&pass=^PASS^:incorrect\"\n"
              " \"/login.php:user=^USER^&pass=^PASS^&colon=colon\\:escape:S=authlog=.*success\"\n"
              " \"/login.php:user=^USER^&pass=^PASS^&mid=123:authlog=.*failed\"\n"
-             " \"/:user=^USER&pass=^PASS^:failed:H=Authorization: Basic dT1w:H=Cookie: sessid=aaaa:h=X-User: ^USER^\"\n"
+             " \"/:user=^USER&pass=^PASS^:failed:H=Authorization\\: Basic dT1w:H=Cookie\\: sessid=aaaa:h=X-User\\: ^USER^\"\n"
              " \"/exchweb/bin/auth/owaauth.dll:destination=http%%3A%%2F%%2F<target>%%2Fexchange&flags=0&username=<domain>%%5C^USER^&password=^PASS^&SubmitCreds=x&trusted=0:reason=:C=/exchweb\"\n",
              hydra_options.service);
       find = 1;