diff --git a/badwitch.py b/badwitch.py
index 9e42f35..b79f2fb 100755
--- a/badwitch.py
+++ b/badwitch.py
@@ -96,7 +96,7 @@ class BadWitch:
         # Flags and arguments
         self.argparser = argparse.ArgumentParser(
                 description='Manage a declarative music library through YouTube scraping')
-        self.argparser.add_argument('-l', '--library', metavar='f', nargs='?',
+        self.argparser.add_argument('-l', '--library', metavar='FILE', nargs='?',
                 help='Override default library file with this one')
         self.argparser.add_argument('-v', '--verbose', action='store_true',
                 help='Show more status messages')