diff --git a/cli/koji_cli/commands.py b/cli/koji_cli/commands.py
index d4462bdd..ebe330af 100644
--- a/cli/koji_cli/commands.py
+++ b/cli/koji_cli/commands.py
@@ -2639,6 +2639,8 @@ def handle_add_group_pkg(goptions, session, args):
 def handle_block_group_pkg(goptions, session, args):
     "[admin] Block a package from a group's package listing"
     usage = _("usage: %prog block-group-pkg [options] <tag> <group> <pkg> [<pkg>...]")
+    usage += '\n' + _("Note, that blocking is propagated through inheritance chain, so "
+                      "it is not exactly the same as package removal.")
     usage += _("\n(Specify the --help global option for a list of other help options)")
     parser = OptionParser(usage=usage)
     (options, args) = parser.parse_args(args)
diff --git a/tests/test_cli/test_block_group_pkg.py b/tests/test_cli/test_block_group_pkg.py
index e035ca61..b9eddb0b 100644
--- a/tests/test_cli/test_block_group_pkg.py
+++ b/tests/test_cli/test_block_group_pkg.py
@@ -20,6 +20,7 @@ class TestBlockGroupPkg(utils.CliTestCase):
         self.activate_session = mock.patch('koji_cli.commands.activate_session').start()
 
         self.error_format = """Usage: %s block-group-pkg [options] <tag> <group> <pkg> [<pkg>...]
+Note, that blocking is propagated through inheritance chain, so it is not exactly the same as package removal.
 (Specify the --help global option for a list of other help options)
 
 %s: error: {message}
@@ -55,6 +56,7 @@ class TestBlockGroupPkg(utils.CliTestCase):
         self.assert_help(
             handle_block_group_pkg,
             """Usage: %s block-group-pkg [options] <tag> <group> <pkg> [<pkg>...]
+Note, that blocking is propagated through inheritance chain, so it is not exactly the same as package removal.
 (Specify the --help global option for a list of other help options)
 
 Options: