diff --git a/main.c b/main.c
index 40ae552..e334e61 100644
--- a/main.c
+++ b/main.c
@@ -86,43 +86,43 @@ static void printhelp(FILE *out,const char *progname)
 		"Usage: %s FILTER [FILTER...] [OPTION]\n"
 		"       %s -f FILTERFILE [OPTION]\n"
 		"\n"
-		"\t-f FILTERFILE       specify filter file which contains filters separated\n"
-		"\t                      by newlines\n"
-		"\t-D                  deduplicate filters\n"
-		"\t-q                  do not print diagnostic output to stderr\n"
-		"\t-x                  do not print onion names\n"
-		"\t-v                  print more diagnostic data\n"
-		"\t-o FILENAME         output onion names to specified file (append)\n"
-		"\t-O FILENAME         output onion names to specified file (overwrite)\n"
-		"\t-F                  include directory names in onion names output\n"
-		"\t-d DIRNAME          output directory\n"
-		"\t-t NUMTHREADS       specify number of threads to utilise (default - CPU\n"
-		"\t                      core count or 1)\n"
-		"\t-j NUMTHREADS       same as -t\n"
-		"\t-n NUMKEYS          specify number of keys (default - 0 - unlimited)\n"
-		"\t-N NUMWORDS         specify number of words per key (default - 1)\n"
-		"\t-Z                  use \"slower\" key generation method (initial default)\n"
-		"\t-z                  use \"faster\" key generation method (later default)\n"
-		"\t-B                  use batching key generation method (>10x faster than\n"
-		"\t                      -z, current default)\n"
-		"\t-s                  print statistics each 10 seconds\n"
-		"\t-S SECONDS          print statistics every specified amount of seconds\n"
-		"\t-T                  do not reset statistics counters when printing\n"
-		"\t-y                  output generated keys in YAML format instead of\n"
-		"\t                      dumping them to filesystem\n"
-		"\t-Y [FILENAME [host.onion]]\n"
-		"\t                    parse YAML encoded input and extract key(s) to\n"
-		"\t                      filesystem\n"
+		"  -f FILTERFILE         specify filter file which contains filters separated\n"
+		"                        by newlines\n"
+		"  -D                    deduplicate filters\n"
+		"  -q                    do not print diagnostic output to stderr\n"
+		"  -x                    do not print onion names\n"
+		"  -v                    print more diagnostic data\n"
+		"  -o FILENAME           output onion names to specified file (append)\n"
+		"  -O FILENAME           output onion names to specified file (overwrite)\n"
+		"  -F                    include directory names in onion names output\n"
+		"  -d DIRNAME            output directory\n"
+		"  -t NUMTHREADS         specify number of threads to utilise (default - CPU\n"
+		"                        core count or 1)\n"
+		"  -j NUMTHREADS         same as -t\n"
+		"  -n NUMKEYS            specify number of keys (default - 0 - unlimited)\n"
+		"  -N NUMWORDS           specify number of words per key (default - 1)\n"
+		"  -Z                    use \"slower\" key generation method (initial default)\n"
+		"  -z                    use \"faster\" key generation method (later default)\n"
+		"  -B                    use batching key generation method (>10x faster than\n"
+		"                        -z, current default)\n"
+		"  -s                    print statistics each 10 seconds\n"
+		"  -S SECONDS            print statistics every specified amount of seconds\n"
+		"  -T                    do not reset statistics counters when printing\n"
+		"  -y                    output generated keys in YAML format instead of\n"
+		"                        dumping them to filesystem\n"
+		"  -Y [FILENAME [host.onion]]\n"
+		"                        parse YAML encoded input and extract key(s) to\n"
+		"                        filesystem\n"
 #ifdef PASSPHRASE
-		"\t-p PASSPHRASE       use passphrase to initialize the random seed with\n"
-		"\t-P                  same as -p, but takes passphrase from PASSPHRASE\n"
-		"\t                      environment variable\n"
+		"  -p PASSPHRASE         use passphrase to initialize the random seed with\n"
+		"  -P                    same as -p, but takes passphrase from PASSPHRASE\n"
+		"                        environment variable\n"
 #endif
-		"\t    --rawyaml       raw (unprefixed) public/secret keys for -y/-Y\n"
-		"\t                      (may be useful for tor controller API)\n"
-		"\t-h, --help          print help to stdout and quit\n"
-		"\t    --usage         same as --help\n"
-		"\t-V, --version       print version information to stdout and exit\n"
+		"      --rawyaml         raw (unprefixed) public/secret keys for -y/-Y\n"
+		"                        (may be useful for tor controller API)\n"
+		"  -h, --help            print help to stdout and quit\n"
+		"      --usage           same as --help\n"
+		"  -V, --version         print version information to stdout and exit\n"
 		"\n"
 		"Report bugs at:     <https://github.com/cathugger/mkp224o/issues>\n"
 		"mkp224o home page:  <https://github.com/cathugger/mkp224o>\n"