1 files changed, 4 insertions, 1 deletions
diff --git a/summain b/summain
index ff9e225..92ad5f3 100755
--- a/summain
+++ b/summain
@@ -33,7 +33,10 @@ class Summain(cliapp.Application):
                               'do not output or compute FIELD',
                               metavar='FIELD')
         self.settings.string_list(['checksum', 'c'],
-                                  'which checksums to compute')
+                                  'which checksums to compute: '
+                                  'MD5, SHA1, SHA224, SHA256, SHA384, SHA512; '
+                                  'use once per checksum type '
+                                  '(default is SHA1)')
 
     def files(self, root):
         if os.path.isdir(root):